THE QUINTIC NONLINEAR SCHRÖDINGER EQUATION ON THREE-DIMENSIONAL ZOLL MANIFOLDS
|
|
- Albert Lyons
- 5 years ago
- Views:
Transcription
1 THE QUINTIC NONLINEAR SCHRÖDINGER EQUATION ON THREE-DIMENSIONAL ZOLL MANIFOLDS SEBASTIAN HERR Abstract. Let (M, g) be a three-dimensional smooth compact Riemannian manifold such that all geodesics are simple and closed with a common minimal period, such as the 3-sphere S 3 with canonical metric. In this work the global well-posedness problem for the quintic nonlinear Schrödinger equation i t u+u = ± u 4 u, u t=0 = u 0 is solved for small initial data u 0 in the energy space H 1 (M), which is the scaling-critical space. Further, local wellposedness for large data, as well as persistence of higher initial Sobolev regularity is obtained. This extends previous results of Burq-Gérard-Tzvetkov to the endpoint case. 1. Introduction and main result Let (M, g) be a smooth Riemannian manifold without boundary and let = g denote the (negative) Laplace-Beltrami operator on M. Consider the Cauchy problem i t u + u = ± u 4 u u t=0 =φ H s (M) If u : ( T, T ) M C is a sufficiently nice solution to (1) one easily verifies conservation of mass and energy m(u(t)) = 1 u(t, x) dx = m(φ), () M e(u(t)) = 1 u(t, x) ± 1 u(t, 3 x) 6 dx = e(φ). (3) M Therefore, the Sobolev space H 1 (M) is the natural energy space for (1), in which for small initial data the local and the global well-posedness problem are at the same level of difficulty. Also, in the three-dimensional Euclidean case (R 3, δ ij ) the scaling u(t, x) λ 1 u(λ t, λx) (λ > 0) 000 Mathematics Subject Classification. 35Q55 (Primary); 58J47 (Secondary). 1 (1)
2 S. HERR maps solutions onto solutions and does not alter the Ḣ1 (R 3 )-norm. Therefore, the energy space is called (scaling-)critical. In continuation of the line of research initiated by Burq-Gérard- Tzvetkov in [4, 6, 5, 7] we focus on three-dimensional Zoll manifolds such as the sphere M = S 3 with canonical metric g, see [1] for more information on the geometric assumption, and (4) below. The subquintic problem on S 3 is solved in [6, Theorem 1], and it is proved that the super-quintic problem is ill-posed in [6, Appendix A]. Wellposedness in H 1 (M) for the quintic nonlinear Schrödinger equation in S 3 is formulated as an open problem in [6, p. 57, l. 11], and it is shown in [7] that the second Picard-iteration is bounded. This is the starting point for the present paper, in which we prove Theorem 1.1. Let s 1 and (M, g) be a three-dimensional smooth compact Riemannian manifold such that all geodesics are simple and closed with a common minimal period. Then, the initial value problem (1) is locally well-posed in H s (M), and globally well-posed in H s (M) if the data is small in H 1 (M). We refer the reader to Theorem 4.1 in Section 4 for a more precise statement of the main result. Theorem 1.1 completes the small data well-posedness theory for 3d Zoll manifolds as we push it to the critical space H 1 (M), and Thomann s work [19] shows that the problem is ill-posed in H s (M) for s < 1 and analytic (M, g). Zoll manifolds have the property that the spectrum of the Laplace- Beltrami operator is clustered around a sequence of squares [9, 8, 1], see (4) below. On the other hand, the spectral cluster estimates [6] are optimal on spheres. This constitutes a sharp contrast to the case of the flat rational torus M = T 3 where we have recently established the analogous result to Theorem 1.1, see [14]. The choice of Zoll manifolds as our setup is motivated from [4, 6, 5]. Also, one of our main ingredients in the proof the trilinear spectral cluster estimates (Lemma 3.) are provided in [6]. In this paper we use critical function space techniques which have been introduced by Tataru and Koch-Tataru [15], see also [10] for further details. They have already been applied to related problems, namely energy-critical Schrödinger equations on M = T 3 [14] and M = R T, R 3 T [13]. On a technical level, however, we face different challenges in this paper as the estimates for space and time variables will be decoupled, and Galilean invariance and fine orthogonality arguments in the spatial frequencies are unavailable. Actually, our function spaces are slightly different and the general strategy of proof of Corollary 3.7 also provides an alternate approach to [14].
3 THE QUINTIC NLS ON 3d ZOLL MANIFOLDS 3 The paper is organized as follows: In Section we describe the geometric and functional setup. Section 3 starts by collecting known estimates on exponential sums and spectral projectors, and after some preparation it concludes with the key estimate of this work in Corollary 3.7. Section 4 contains the main nonlinear estimate and a precise statement of the main result in Theorem 4.1. In the Appendix we describe the necessary modifications with respect to Bourgain s paper [] in order to conclude Lemma Notation and function spaces Since M is compact, the spectrum σ( ) of = g is discrete and we list the nonnegative eigenvalues 0 = λ 0 λ 1... λ n +. Define h k : L (M) L (M) to be the spectral projector onto the eigenspace E k corresponding to the eigenvalue λ k. We have the orthogonal decomposition L (M) = E k, Following [4, 6, 5] we assume that (M, g) is a three-dimensional Zoll manifold, i.e. all geodesics are simple and closed with a common minimal period T, and without loss we may assume that T = π. In fact, we are using this assumption only to conclude that the spectrum is clustered around the sequence µ n where µ n := (n + α/4) (for convenience of notation we define µ 0 := 0). More precisely, there exist α, E N such that k=0 σ( ) n=1i n, where I n = [µ n E, µ n + E], (4) see [9, 8, 1]. By adding a bounded interval I 0, and increasing α and relabeling if necessary, we may assume without loss of generality that σ( ) n=0i n, where I n = [µ n E, µ n + E] for n 1, and I 0 = [ B, B], (5) with the additional property that all these intervals are pairwise disjoint. Let p n = k N 0 :λ h k In k for n N 0. Note that this is a spectral projector to which the result of [6, Theorem 3] applies. We have p n = Id. For subsets J R we define n=0 P J = n J N 0 p n.
4 4 S. HERR Specifically, for dyadic numbers N = 1,, 4,... we write P N = P [N,N), P 0 = p 0, such that N 0 P N = Id, where we add up all dyadic N 1 and N = 0. We define H s (M) = (1 g ) s/ L (M) with f H s (M) = λ j s h j f L (M), where x = (1 + x ) 1/ and observe that f H s (M) n=0 n s p n f L (M) N s P N f L (M). N 0 Remark 1. In the case M = S 3 the eigenfunctions in E k = h k L (S 3 ) are precisely the spherical harmonics of degree k, with eigenvalues λ k = (k + 1) 1, and dim(e k ) = (k + 1), see e.g. [18, Section 8.4]. With E = 1, α = 4 in (4) we have λ k I n if and only if k = n, and λ n = µ n 1 for n. For technical purposes we introduce the operator defined by φ = µ np n φ, n=1 which is similar to the construction in [5, formula (3.5)]. Let us quickly review the theory of the critical function spaces U p and V p which have been introduced in the context of dispersive PDEs by Tataru and Koch-Tataru, see [15]. We refer the reader to the papers [10, 14] for more details. Let χ I : R R denote the sharp characteristic function of a set I R. Let Z be the set of finite partitions < t 0 < t 1 <... < t K of the real line. If t K =, we use the convention that v(t K ) := 0 for all functions v : R L. Definition.1. Let 1 p <. (i) Any step-function a : R L, a = K χ [tk 1,t k )φ k 1 k=1 with {t k } Z, {φ k } L s.t. K 1 k=0 φ k p L = 1, is called a U p -atom. We define U p as the corresponding atomic space, i.e.
5 THE QUINTIC NLS ON 3d ZOLL MANIFOLDS 5 the space of all u : R L which can be written as u = α j a j (6) with U p -atoms a j, and {α j } l 1 (N, C). The norm of a function u U p is defined as inf α j, where the infimum is taken over all atomic representations (6) of u. (ii) Define V p as the space of all right-continuous functions v : R L s.t. ( K ) 1 p v V p := sup v(t k ) v(t k 1 ) p L, (7) {t k } Z k=1 is finite (here we use the convention v( ) = 0), and additionally satisfying lim t v(t) = 0. (iii) If L = L (M; C), and A denotes either the standard Laplacian or, we also define U p A = eita U p and V p A = eita V p. Remark. (i) Note that the space V p corresponds to V p,rc in [10]. (ii) The spaces U p, V p and U p A, V p A are Banach spaces of bounded functions which are right-continuous and tend to 0 as t. (iii) For 1 p < q < it holds U p A V p A U q A L (R; L ). Our aim is to control the evolution up to time T 1. But on bounded time intervals the flows associated to the operators and stay close, a statement which is made precise next. Lemma.. Let 1 p < and τ be a bounded time interval, and let u : R L (M; C) be supported in τ. Then, u U p if and only if u U p e, with equivalent norms. Proof. Let ψ C 0 (R) be a smooth cutoff function which is constantly equal to 1 on τ. The claim follows from the fact that ψe ±it( e ) : U p U p are bounded operators. It suffices to consider an atom a. With B j := n=0 k N 0 :λ k In(±λ k µ n) j h k we write ψ(t)e ±it( ) e ψ(t)(it) j a(t) = B j a(t), j! In view of (5) we have B j L L bj, where b = max{e, B} 1. This implies B j a U p with B j a U p b j. Also, multiplication by ψ, as
6 6 S. HERR well as multiplication by t on the support of ψ are bounded operations in U p, which follows by duality [10, Remark.11]. This implies t j ψb j a U p c j. The claim follows, since c j < + and U p is a complete space. j! Definition.3. Let s R. (i) We define X s as the space of all functions u : R H s (M; C) such that the maps P N (u( )) : R L (M; C) are in U for all dyadic N 0, endowed with the norm ( ) 1 u X s := N s P N u U. (8) N 0 (ii) We define Y s as the space of all functions u : R H s (M; C) such that the maps P N (u( )) : R L (M; C) are in V for all dyadic N 0, equipped with the norm ( ) 1 u Y s := N s P N u V. (9) N 0 For a time interval τ R we define X s (τ) and Y s (τ) to be the corresponding restriction space. The above remark implies U X 0 Y 0 V. Moreover, there is a useful interpolation type property of U p and V p spaces, see [10, Proposition.0] and [14, Lemma.4]. Lemma.4. Let q 1, q, q 3 >, τ be a time interval, and T : U q 1 U q U q 3 L (τ M) be a bounded, tri-linear operator with T (u 1, u, u 3 ) L C 3 u q j U j. In addition, assume that there exists C (0, C] such that the estimate T (u 1, u, u 3 ) L C 3 u j U holds true. Then, T satisfies the estimate T (u 1, u, u 3 ) L C (ln C + 1) 3 u j C V, u j V, j = 1,, 3. Let τ = [a, b), f L 1 (τ; L (M; C)) and define I(f)(t) := t a e i(t s) f(s)ds (10)
7 THE QUINTIC NLS ON 3d ZOLL MANIFOLDS 7 for t τ and I(f)(t) = 0 for t < a and I(f)(t) = I(f)(b) for t b. Lemma.5. Let s R, τ = [a, b) R. (i) For all u 0 H s (M) and u(t) := χ τ (t)e it u 0 we have u X s (τ) and u X s (τ) u 0 H s. (11) (ii) Let P N f L 1 (τ; L (M)) for all N 0. Then, N 0 I(P Nf) =: I(f) converges in X s (τ) and I(f) X s (τ) sup P N f(t, x)v(t, x)dxdt, (1) v Y s (τ) =1 N 0 τ M provided that the r.h.s in (1) is finite. We refer the reader to [14, Propositions.10 and.11] and [10, Propositions.8 and.10] for analogous statements and proofs, which apply here with trivial modifications. 3. Linear and multilinear estimates We use an extension of Bourgain s estimate [, Proposition 1.10 and Section 4] on exponential sums which is due to Burq Gérard Tzvetkov [7, Lemma 5.3] in the case p = 6, µ n = n. For convenience we choose τ 0 = [0, 3π] as our base time interval, as this is a joint period of e itµ n. Lemma 3.1. Let p > 4 and α N 0. It holds that ( c n e itµ n N 1/ /p n Z J L p t (τ 0) n Z J c n ) 1 for every J = [b, b + N] with N 1 and the sequence µ n = n + α/4. (13) A proof can be found in Appendix A. We will also rely on the trilinear spectral projector estimate of Burq Gérard Tzvetkov [6], which is valid on every smooth Riemannian three-manifold (M, g). Lemma 3. ([6], Theorem 3). Let 0 < ɛ 1. For all integers n 1 n n 3 0 and f 1, f, f 3 L (M) the estimate p n1 f 1 p n f p n3 f 3 L (M) n 1/+ɛ n 3 1 ɛ p nk f k L (M) (14) holds true. In the nonlinear analysis we need another useful and well-known estimate concerning the spectral localization of products of eigenfunctions. k=1
8 8 S. HERR Lemma 3.3. If N 0 N 1, N, N 3 are dyadic and γ 1, then P N0 f 0 P N1 f 1 P N f P N3 f 3 dx N γ P Nj f j L (M) (15) M where the implicit constant depends only on γ. Proof. For single eigenfunctions it can be found in [5, Lemma.6] (written for d = ) or more generally in [11, Section 4]. By the Weyl asymptotic the number of eigenvalues λ k I n j grows at most like n j in dimension d = 3, which implies P N0 f 0 P N1 f 1 P N f P N3 f 3 dx M h k0 f 0 h k1 f 1 h k f h k3 f 3 dx n j N j k j :λ k I j n j M 0 n j N j k γ 10 0 k j :λ k I j n j h kj f j L N γ 0 P Nj f j L, by Cauchy-Schwarz, cp. also [5, Lemma.7] for similar arguments. Note that Lemma 3.3 is trivial in specific cases such as M = S 3 with canonical metric. For later reference we explicitely state a crude bound which disregards all oscillations in time. Lemma 3.4. For all u 1, u, u 3 L (τ; L (M)), and dyadic N 1 N N 3 0 and time intervals τ the estimate P N1 u 1 P N u P N3 u 3 L (τ M) τ 1 3 N N 3 3 u j L (τ;l (M)) (16) holds true. Proof. By Hölder s inequality we obtain P N1 u 1 P N u P N3 u 3 L (τ M) τ 1 PN1 u 1 L (τ;l (M) P N u L (τ M) P N3 u 3 L (τ M). For t fixed we have P Nj u j (t) L (M) n j N j p nj u j (t) L (M) n j p nj u j (t) L (M) Nj P N j u j (t) L (M) n j N j 3
9 THE QUINTIC NLS ON 3d ZOLL MANIFOLDS 9 by Sogge s estimate [16, Proposition.1] and the Cauchy-Schwarz inequality. The claim follows by taking the supremum in t. Next, we prove (dyadic) Strichartz estimates in a restricted range, generalizing [7, Proposition 5.1]. Lemma 3.5. Let p > 4. Then, for all N 0 we have and P N e it φ L p (τ 0 M) N 3 5 p φ L. (17) P N u L p (τ 0 M) N 3 5 p u U p. (18) Proof. a) First, we prove estimate (17) with replacing. We write and Lemma 3.1 yields P N e it e φ(x) = n N P N e it e φ(x) L p (τ 0 ) N 1 p e itµ n pn φ(x), ( n N p n φ(x) ) 1 Integration in x, an application of Minkowski s inequality and the dual of Sogge s estimate [16, formula (.3)] imply that ( ) 1 ( p n φ(x) ) 1 p n φ L p L (M) p n N ( ) n 6 1 p pn φ L n N n N N 1 3 p φ L, where we have used orthogonality in the last step. b) Now, let u U p. By Lemma. it suffices to prove the bound (18) for a U p e -atom u(t, x) = Estimate (17) yields K χ [tk 1,t k )e it e φ k 1 (x), k=1 K 1 k=0 φ k p L = 1. ( K P N u L p (τ 0 M) P N e it e φ k 1 p L p (τ 0 M) k=1 ( K N 3 5 p P N φ k 1 p L (M) N 3 5 p. k=1 ) 1 p ) 1 p
10 10 S. HERR This proves the second bound (18), which in turn implies (17) and the proof is complete. E.g. on the sphere M = S 3, the restriction to dyadic frequency bands can be removed by Littlewood-Paley theory [17], but we do not need it here. Also, the loss of derivatives precisely matches the loss on R 3 coming from the sharp Strichartz estimate and the Sobolev embedding, and also Bourgain s bound on T 3 [3]. For an interval J we write P N,J = P J P N. The next Proposition is an extension and improvement of [7, Theorem 5.1]. Proposition 3.6. Let δ (0, 1 ) and η > 0. Then, for all u 1, u, u 3 U, and dyadic N 1 N N 3 0 the estimate holds true. P N1 u 1 P N u P N3 u 3 L (τ 0 M) ( N N ) δ N 1 +η+δ N 3 3 η δ u j N U. (19) Proof. a) In the case N 3 N 1 the l.h.s. is bounded by our crude estimate (16) in conjunction with Remark (iii). Henceforth we assume N 1. Since τ 0 is a compact interval, it suffices to prove the corresponding bound in U e U e U e by Lemma.. Further, by definition of the spaces it suffices to consider U e -atoms u j (t, x) = K j k j =1 χ (j) [t k j 1,t(j) k ) eit φ (j) k j 1 (x), j for j = 1,, 3. However, in this case P Nj u j L (τ 0 M) k 1,k,k 3 Kj 1 k j =0 φ (j) k j L = 1, P Nj e it φ (j) k j 1 L (τ 0 M), so the claim (19) follows if we can show it in the case b) Assume (0). We define the partition u j = e it e φ j, j = 1,, 3. (0) N 0 = m N0 J m where J m = [mn /N 1, (m + 1)N /N 1 ) N 0 in order to proceed similarly to [14, proof of (6), p ] and [13]: For fixed x M it holds P N1 u 1 P N u P N3 u 3 (x) L (τ 0 ) m P N1,J m u 1 P N u P N3 u 3 (x) L (τ 0 ),
11 THE QUINTIC NLS ON 3d ZOLL MANIFOLDS 11 due to almost orthogonality induced by the time oscillations. Indeed, it holds that where P N1,J m u 1 P N u P N3 u 3 (x), P N1,J m u 1 P N u P N3 u 3 (x) L (τ 0 ) = p nj φ j (x)p nj φ j (x) n j,n j Nj n 1 Jm,n 1 Jm I n 1,n,n 3 n 1,n,n 3 I n 1,n,n 3 n 1,n,n 3 = e itµ n 1 e itµ n e itµ n 3 e itµ n 1 e itµ n e itµ n 3 dt. τ 0 For every m m 1 and n 1, n 1 N 1 such that n 1 J m, n 1 J m and all n, n N, n 3, n 3 N 3 we have the following estimate for the phase 3 (µ n j µ n j ) µ n 1 µ n 1 8N m m N, because µ n1 + µ n1 N 1, which implies I n 1,n,n 3 n 1,n,n 3 = 0. c) By parts a) and b) the claim is reduced to showing that P N1,Ju 1 P N u P N3 u 3 L (τ 0 M) J δ N 1 +η N 3 3 η δ φ j L. (1) for u j of the form (0), and intervals of length J 1. This is a refinement of [7, Theorem 5.1], which is proved as follows: For fixed x M we obtain by Hölder s inequality P N1,Ju 1 P N u P N3 u 3 (x) L (τ 0 ) P N1,Ju 1 (x) L p 1 (τ0 ) P N u (x) L p (τ0 ) P N3 u 3 (x) L p 3 (τ0 ) where 1/p 1 + 1/p + 1/p 3 = 1/ which we choose to satisfy 4 < p 1, p, p 3 < +. An application of (13) gives and also ( P N1,Ju 1 (x) p L 1 t (τ 0) J 1 p 1 1 P Nj u j (x) p N L j t (τ 0) j p j n 1 N 1 n 1 J ( p n1 φ 1 (x) ) 1 n j N j p nj φ j (x) ) 1
12 1 S. HERR for j =, 3. By integration with respect to x M we obtain P N1,Ju 1 P N u P N3 u 3 L (τ 0 M) J 1 1 p 1 N 1 ( p N p 3 3 p nj φ j L (M) J 1 n j N j p 1 N 1+ɛ 3 p N ɛ p 3 3 φ j L (M) for any small ɛ > 0, where we have used the trilinear spectral cluster estimate (14) in the last step, similar to the proof of [7, Theorem 5.1]. The claim follows with δ = 1 p 1 (0, 1) by choosing p > 4 and ɛ > 0 small enough such that ɛ + 1 p = η. Finally, we transfer the bound to V by interpolation and obtain a result which corresponds to [14, Propositon 3.5] in the case of M = T 3. The argument, however, is slightly different from the one in [14, 13] as it does not involve finer than dyadic scales. Corollary 3.7. There exists α > 0, such that for all u 1, u, u 3 V, and dyadic N 1 N N 3 0 the estimate ) 1 holds true. P N1 u 1 P N u P N3 u 3 L (τ 0 M) { N3 max N 1, 1 } α N N 3 N u j V. Proof. We restrict our attention to the nontrivial case N 1 treat the two cases () 1, and a) N N 1 b) N < N 1 separately. Case a) For p, q > 4 satisfying p + 1 q = 1 P N1 u 1 P N u P N3 u 3 L (τ 0 M) we exploit (18) P N1 u 1 L p (τ 0 M) P N u L p (τ 0 M) P N3 u 3 L q (τ 0 M) N 3 5 p 1 N 3 5 p N q PN1 u 1 U p P N u U p P N 3 u 3 U q. Let ρ > 0 be small. We choose p > 4 such that 3 5 = 1 + ρ. Then, p 4 P N1 u 1 P N u P N3 u 3 L (τ 0 M) ( ) 1 N1 4 +ρ N 1 +ρ N 3 3 ρ P N1 u 1 U p P N u U p P N 3 u 3 U q. (3) N
13 THE QUINTIC NLS ON 3d ZOLL MANIFOLDS 13 Interpolating (19) and (3) via Lemma.4 yields P N1 u 1 P N u P N3 u 3 L (τ 0 M) ( N ) δ N 1 +δ N 3 3 δ u j N V. 1 for small δ > 0, because in the present case we have N N 1. Case b) In this case where N < N 1, the key is to observe that (19) provides the subcritical bound P N1 u 1 P N u P N3 u 3 L (τ 0 M) N 1 +η N 3 u j U. (4) for any η > 0. On the other hand, estimate (16) and Remark (iii) imply P N1 u 1 P N u P N3 u 3 L (τ 0 M) N 3 N3 3 for any p [1, ), so interpolation via Lemma.4 yields P N1 u 1 P N u P N3 u 3 L (τ 0 M) N 1 +η N 3 for any η > 0, which implies () in this case. 4. The main result u j U p. u j V. (5) As usual, we rewrite the initial value problem as an integral equation u(t) = e it φ ii( u 4 u)(t). (6) Now, we restate Theorem 1.1 in a more precise form. Let us denote the ball in H 1 (M) with center φ and radius ε by B ε (φ). Theorem 4.1. Let (M, g) be a three-dimensional compact smooth Riemannian manifold with Laplace-Beltrami operator satisfying the spectral condition (4), and let s 1. (i) (Local well-posedness) For every φ H 1 (M) there exists ε > 0 and T = T (φ ) > 0 such that the following holds true: (a) For all initial data φ B ε (φ ) H s (M) the Cauchy problem (6) has a unique solution u =: Φ(φ) C([0, T ); H s (M)) X s ([0, T )).
14 14 S. HERR (b) The solution constructed in Part (i)(a) obeys the conservation laws (3) and (), and the flow map Φ : B ε (φ ) H s (M) C([0, T ); H s (M)) X s ([0, T )) is Lipschitz continuous. (ii) (Global well-posedness for small data) With φ = 0 there exists ε 0 > 0 such that for all T > 0 the assertions (i)(a) and (i)(b) above hold true. The proof is very similar to the proof of [14, Theorems 1.1 and 1.], as it is based on the following Proposition 4. which corresponds to [14, Proposition 4.1]. Proposition 4.. Let s 1. Then, for all intervals τ τ 0 and all u j X s (τ), j = 1,..., 5, the estimate ( ) X I ũ j s (τ) 5 u k X s (τ) k=1 ;j k u j X 1 (τ) (7) holds true, where ũ j denotes either u j or its complex conjugate u j. Proof. The proof is a variation of the proof of [14, Proposition 4.1], so we focus on the new aspects here: Lemma.5 implies that I( 5 ũj) X s (τ) and I( ũ j ) sup P N0 ũ j u 0 dxdt, X s (τ) u 0 Y s (τ) =1 N 0 0 τ M provided that the r. h. s. is finite. Thus, by choosing suitable extensions (which we also denote by u j ) the claim is reduced to proving N 0 0 τ M P N0 ũ 0 ũ j dxdt u 0 Y s 5 u k X s k=1 k=1;k j u k X 1, (8) We dyadically decompose each ũ k, and by symmetry in u 1,..., u 5 it suffices to consider Σ := P Nj ũ j dxdt N 0 0; N 1... N 5 0 τ M We split the sum Σ = Σ 1 + Σ, where Σ 1 is defined by the constraint max{n 0, N } N 1. Σ 1 is the major contribution which can be handled by means of the Cauchy-Schwarz inequality and Corollary 3.7 precisely
15 THE QUINTIC NLS ON 3d ZOLL MANIFOLDS 15 as in the proof of [14, Proposition 4.1]. The result is Σ 1 u 0 Y s u 1 X s u j X 1. In fact, in specific cases such as M = S 3 there will be no further contribution because the product of five spherical harmonics of maximal degree k can be developed into a series of spherical harmonics of maximal degree 5k. In general, however, it remains to consider a minor contribution of lower order, which comes from the range where max{n 0, N } N 1 or N 1 N 0, and which we split Σ = Σ 1 + Σ accordingly. We have Σ 1 I(N 0,..., N 5, L)(t)dt, where N... N 5 ; N 1 N 0,N L 0 I(N 0,..., N 5, L)(t) = M τ j= ( ) P L P Nj ũ j P Nj ũ j dx. If L N 1 we apply Lemma 3.3 (recall that N 3, N 4, N 5 L), to deduce I(N 0,..., N 5, L)(t) L 5 P L (P N0 u 0 P N1 u 1 P N u )(t) L (M) j=3 P Nj u j (t) L (M), and Hölder s inequality and Lemma 3.4 imply I(N 0,..., N 5, L)(t) dt L 5 N 3 0 N 3 P Nj u j L (τ 0 ;L (M)), τ which implies L N 1 τ j=3 I(N 0,..., N 5, L)(t)dt N 1 P Nj u j V. (9) On the other hand, if L N 1 we apply Lemma 3.3 (in this case L, N 0, N N 1 ), to deduce I(N 0,..., N 5, L)(t) N1 5 P Nj u j (t) L (M) P L (P N3 u 3 P N4 u 4 P N5 u 5 )(t) L (M)
16 16 S. HERR and Hölder s inequality and Lemma 3.4 imply I(N 0,..., N 5, L)(t) dt N1 5 N 3 4 N 3 5 P Nj u j L (τ 0 ;L (M)). τ which together with (9) gives I(N 0,..., N 5, L)(t)dt N 1 L 0 τ Dyadic summation easily yields Σ 1 u 0 Y s u 1 X s 1 P Nj u j V. u j X 1. The contribution of Σ, where N 0 N 1 N... N 5 can be treated in the same way by switching the roles of N 1 and N 0. The proof of Theorem 4.1 based on Proposition 4. and the contraction mapping principle is standard and can be concluded as in [14, Section 4], cp. also the references therein. Appendix A. Proof of Lemma 3.1 For the sake of completeness, we include a proof of Lemma 3.1 here. This result has been proved in the case J = [1, N] and µ n = n in [, Section 4] and stated for general J in the case p = 6 in [7]. More precisely, we describe here the necessary modifications with respect to Bourgain s original work [, Section 4]. We closely follow the presentation in [, Section 4]. For this reason we work in the 1-periodic (instead of the π-periodic) setup here. However, note that we replaced δn 1 with λ. We also refer the reader to [3, Section 3], and to the book [0] for more details on the circle method of Hardy and Littlewood. First of all, we switch from t to t, and reduce the estimate (3.1) for general α N 0 to the case α = 0. The latter simply follows by dilating time by the factor 16 and applying the result for α = 0 on [0, π] to a modified sequence and the translated and dilated interval 4J + α. From now on we will assume that µ n = n. Let N denote the set of positive integers, and let J = [b, b + N], b, N N. As in [3, Section 3] we choose a sequence σ satisfying (i) For all n Z: 0 σ n 1; for all n J: σ n = 1 for n J; for all n such that n < b N or n > b + N: σ n = 0. (ii) The sequence (σ n+1 σ n ) is bounded by N 1 and has variation bounded by N 1.
17 THE QUINTIC NLS ON 3d ZOLL MANIFOLDS 17 Let p > 4, and 0 < ε 1 such that p ε > 4. Our aim is to prove the distributional inequality { sup t [0, 1] : } c n σ n e πitn > λ Cε N ε/ λ 4 ε, (30) b N n Z for all c n such that n c n = 1, which implies (13), because the set is empty if λ N 1/. a) There exists c ε > 0 such that sup #{(n 1, n ) N : n 1, n N; k N,b N 0 n 1 (n + b) = k} c ε N ε 400. In the case 0 b 10N this follows from the standard bound on the number of divisors function, see [1, Theorem 315]. Otherwise, the set contains at most one element. With this ingredient one can easily modify the argument in [, formulas (1.3)-(1.6)] to deduce c n σ n e πitn L 4 t (0,1) n Z N ε 400 ( n Z c n ) 1. (31) This bound implies (30) for λ N 1/ ν/4 for ν = 1/100, so it remains to prove (30) in the case N 1/ ν/4 λ N 1/. b) It holds σ n e πitn q 1/ ( t a/q + N ) 1/, (3) n Z for any 1 a < q < N, gcd(a, q) = 1 and t a/q < (qn) 1. The claim (3) follows from σ b+m e 4πibt e πitm n Z σ n e πitn = e πitb m Z and [3, Lemma 3.18] with x = bt. Estimate (3) replaces [, formula (4.10)], with f(t) = n Z σ n e πitn. c) We define the major arcs M to be the disjoint union of the sets M(q, a) = {t [0, 1] : t a/q N ν }, for any 1 a q N ν, gcd(a, q) = 1. Let t [0, 1]\M. By Dirichlet s Lemma there exists a reduced fraction a/q with 1 a q N ν such that t a/q N ν, and since t / M it must be q > N ν and (3) implies f(t) N 1 ν/, (33) which replaces [, formula (4.6)].
18 18 S. HERR d) In order to prove (30), it therefore suffices to prove a bound on the number R of N -separated points t 1,..., t R [0, 1] where c n σ n e πin t r > λ. n Z We recall that N 1/ ν/4 λ N 1/. As in [] we obtain σ n e πin (t r t r ) > λ R. n Z 1 r,r R For fixed γ > this estimate and Hölder s inequality yield f(t r t r ) γ > λ γ R, 1 r,r R which replaces [, formula (4.13) with λ = δn 1 ]. From here, the arguments in [, pp ] apply verbatim and show that R λ 4 ε N + ε. Because of the N -separation property of the points t 1,..., t R this implies { } t [0, 1] : σ n c n e πitn > λ N λ 4 ε N + ε, which gives (30). n Z Acknowledgments. I am indebted to Daniel Tataru and Nikolay Tzvetkov for introducing me to this circle of problems and for helpful and stimulating discussions. I would also like to thank Christoph Thiele for a helpful conversation about []. References 1. A. Besse, Manifolds all of whose geodesics are closed, Ergebnisse der Mathematik und ihrer Grenzgebiete [Results in Mathematics and Related Areas], vol. 93, Springer-Verlag, Berlin, 1978, With appendices by D. B. A. Epstein, J.-P. Bourguignon, L. Bérard-Bergery, M. Berger and J. L. Kazdan. MR (80c:53044). J. Bourgain, On Λ(p)-subsets of squares, Israel J. Math. 67 (1989), no. 3, MR (91d:43018) 3., Fourier transform restriction phenomena for certain lattice subsets and applications to nonlinear evolution equations. I. Schrödinger equations, Geom. Funct. Anal. 3 (1993), no., MR10999 (95d:35160a) 4. N. Burq, P. Gérard, and N. Tzvetkov, Strichartz inequalities and the nonlinear Schrödinger equation on compact manifolds, Amer. J. Math. 16 (004), no. 3, MR (005h:58036)
19 THE QUINTIC NLS ON 3d ZOLL MANIFOLDS 19 5., Bilinear eigenfunction estimates and the nonlinear Schrödinger equation on surfaces, Invent. Math. 159 (005), no. 1, MR14336 (005m:3575) 6., Multilinear eigenfunction estimates and global existence for the three dimensional nonlinear Schrödinger equations, Ann. Sci. École Norm. Sup. (4) 38 (005), no., MR (006m:35337) 7., Global solutions for the nonlinear Schrödinger equation on threedimensional compact manifolds, Mathematical aspects of nonlinear dispersive equations, Ann. of Math. Stud., vol. 163, Princeton Univ. Press, Princeton, NJ, 007, pp MR33309 (008i:5806) 8. Y. Colin de Verdière, Sur le spectre des opérateurs elliptiques à bicaractéristiques toutes périodiques, Comment. Math. Helv. 54 (1979), no. 3, MR33309 (008i:5806) 9. J. Duistermaat and V. Guillemin, The spectrum of positive elliptic operators and periodic bicharacteristics, Invent. Math. 9 (1975), no. 1, MR33309 (008i:5806) 10. M. Hadac, S. Herr, and H. Koch, Well-posedness and scattering for the KP-II equation in a critical space, Ann. Inst. H. Poincaré AN 6 (009), no. 3, , Erratum published at MR56409 (010d:35301) 11. Z. Hani, Global well-posedness of the cubic nonlinear Schrödinger equation on compact manifolds without boundary, Preprint, arxiv: G. Hardy and E. Wright, An introduction to the theory of numbers, fifth ed., The Clarendon Press Oxford University Press, New York, MR56409 (010d:35301) 13. S. Herr, D. Tataru, and N. Tzvetkov, Strichartz estimates for partially periodic solutions to Schrödinger equations in 4d and applications, Preprint, arxiv: , , Global well-posedness of the energy critical Nonlinear Schrödinger equation with small initial data in H 1 (T 3 ), Duke Math. J. 59 (011), no., H. Koch and D. Tataru, Dispersive estimates for principally normal pseudodifferential operators, Comm. Pure Appl. Math. 58 (005), no., MR56409 (010d:35301) 16. C. Sogge, Concerning the L p norm of spectral clusters for second-order elliptic operators on compact manifolds, J. Funct. Anal. 77 (1988), no. 1, MR56409 (010d:35301) 17. R. Strichartz, Multipliers for spherical harmonic expansions, Trans. Amer. Math. Soc. 167 (197), MR56409 (010d:35301) 18. M. Taylor, Partial differential equations. II, Applied Mathematical Sciences, vol. 116, Springer-Verlag, New York, 1996, Qualitative studies of linear equations. MR (98b:35003) 19. L. Thomann, Instabilities for supercritical Schrödinger equations in analytic manifolds, J. Differential Equations 45 (008), no. 1, MR (98b:35003) 0. R. Vaughan, The Hardy-Littlewood method, Cambridge Tracts in Mathematics, vol. 80, Cambridge University Press, Cambridge, MR (98b:35003)
20 0 S. HERR 1. A. Weinstein, Asymptotics of eigenvalue clusters for the Laplacian plus a potential, Duke Math. J. 44 (1977), no. 4, MR (98b:35003) Universität Bonn, Mathematisches Institut, Endenicher Allee 60, Bonn, Germany Current address: Universität Bielefeld, Fakultät für Mathematik, Postfach , Bielefeld, Germany address: herr@math.uni-bielefeld.de
TADAHIRO OH 0, 3 8 (T R), (1.5) The result in [2] is in fact stated for time-periodic functions: 0, 1 3 (T 2 ). (1.4)
PERIODIC L 4 -STRICHARTZ ESTIMATE FOR KDV TADAHIRO OH 1. Introduction In [], Bourgain proved global well-posedness of the periodic KdV in L T): u t + u xxx + uu x 0, x, t) T R. 1.1) The key ingredient
More informationarxiv: v3 [math.ap] 14 Nov 2010
arxiv:1005.2832v3 [math.ap] 14 Nov 2010 GLOBAL WELL-POSEDNESS OF THE ENERGY CRITICAL NONLINEAR SCHRÖDINGER EQUATION WITH SMALL INITIAL DATA IN H 1 (T 3 ) SEBASTIAN HERR, DANIEL TATARU, AND NIKOLAY TZVETKOV
More informationA PHYSICAL SPACE PROOF OF THE BILINEAR STRICHARTZ AND LOCAL SMOOTHING ESTIMATES FOR THE SCHRÖDINGER EQUATION
A PHYSICAL SPACE PROOF OF THE BILINEAR STRICHARTZ AND LOCAL SMOOTHING ESTIMATES FOR THE SCHRÖDINGER EQUATION TERENCE TAO Abstract. Let d 1, and let u, v : R R d C be Schwartz space solutions to the Schrödinger
More informationCUTOFF RESOLVENT ESTIMATES AND THE SEMILINEAR SCHRÖDINGER EQUATION
CUTOFF RESOLVENT ESTIMATES AND THE SEMILINEAR SCHRÖDINGER EQUATION HANS CHRISTIANSON Abstract. This paper shows how abstract resolvent estimates imply local smoothing for solutions to the Schrödinger equation.
More informationA REMARK ON AN EQUATION OF WAVE MAPS TYPE WITH VARIABLE COEFFICIENTS
A REMARK ON AN EQUATION OF WAVE MAPS TYPE WITH VARIABLE COEFFICIENTS DAN-ANDREI GEBA Abstract. We obtain a sharp local well-posedness result for an equation of wave maps type with variable coefficients.
More informationON STRICHARTZ ESTIMATES FOR SCHRÖDINGER OPERATORS IN COMPACT MANIFOLDS WITH BOUNDARY. 1. Introduction
ON STRICHARTZ ESTIMATES FOR SCHRÖDINGER OPERATORS IN COMPACT MANIFOLDS WITH BOUNDARY MATTHEW D. BLAIR, HART F. SMITH, AND CHRISTOPHER D. SOGGE 1. Introduction Let (M, g) be a Riemannian manifold of dimension
More informationBIHARMONIC WAVE MAPS INTO SPHERES
BIHARMONIC WAVE MAPS INTO SPHERES SEBASTIAN HERR, TOBIAS LAMM, AND ROLAND SCHNAUBELT Abstract. A global weak solution of the biharmonic wave map equation in the energy space for spherical targets is constructed.
More informationEnergy transfer model and large periodic boundary value problem for the quintic NLS
Energy transfer model and large periodic boundary value problem for the quintic NS Hideo Takaoka Department of Mathematics, Kobe University 1 ntroduction This note is based on a talk given at the conference
More informationBLOWUP THEORY FOR THE CRITICAL NONLINEAR SCHRÖDINGER EQUATIONS REVISITED
BLOWUP THEORY FOR THE CRITICAL NONLINEAR SCHRÖDINGER EQUATIONS REVISITED TAOUFIK HMIDI AND SAHBI KERAANI Abstract. In this note we prove a refined version of compactness lemma adapted to the blowup analysis
More informationThe Chern-Simons-Schrödinger equation
The Chern-Simons-Schrödinger equation Low regularity local wellposedness Baoping Liu, Paul Smith, Daniel Tataru University of California, Berkeley July 16, 2012 Paul Smith (UC Berkeley) Chern-Simons-Schrödinger
More informationThe Gaussian free field, Gibbs measures and NLS on planar domains
The Gaussian free field, Gibbs measures and on planar domains N. Burq, joint with L. Thomann (Nantes) and N. Tzvetkov (Cergy) Université Paris Sud, Laboratoire de Mathématiques d Orsay, CNRS UMR 8628 LAGA,
More informationThe NLS on product spaces and applications
October 2014, Orsay The NLS on product spaces and applications Nikolay Tzvetkov Cergy-Pontoise University based on joint work with Zaher Hani, Benoit Pausader and Nicola Visciglia A basic result Consider
More informationBlow-up on manifolds with symmetry for the nonlinear Schröding
Blow-up on manifolds with symmetry for the nonlinear Schrödinger equation March, 27 2013 Université de Nice Euclidean L 2 -critical theory Consider the one dimensional equation i t u + u = u 4 u, t > 0,
More informationPOINTWISE BOUNDS ON QUASIMODES OF SEMICLASSICAL SCHRÖDINGER OPERATORS IN DIMENSION TWO
POINTWISE BOUNDS ON QUASIMODES OF SEMICLASSICAL SCHRÖDINGER OPERATORS IN DIMENSION TWO HART F. SMITH AND MACIEJ ZWORSKI Abstract. We prove optimal pointwise bounds on quasimodes of semiclassical Schrödinger
More informationGlobal well-posedness for semi-linear Wave and Schrödinger equations. Slim Ibrahim
Global well-posedness for semi-linear Wave and Schrödinger equations Slim Ibrahim McMaster University, Hamilton ON University of Calgary, April 27th, 2006 1 1 Introduction Nonlinear Wave equation: ( 2
More informationAnalysis in weighted spaces : preliminary version
Analysis in weighted spaces : preliminary version Frank Pacard To cite this version: Frank Pacard. Analysis in weighted spaces : preliminary version. 3rd cycle. Téhéran (Iran, 2006, pp.75.
More informationInégalités de dispersion via le semi-groupe de la chaleur
Inégalités de dispersion via le semi-groupe de la chaleur Valentin Samoyeau, Advisor: Frédéric Bernicot. Laboratoire de Mathématiques Jean Leray, Université de Nantes January 28, 2016 1 Introduction Schrödinger
More informationStrichartz Estimates for the Schrödinger Equation in Exterior Domains
Strichartz Estimates for the Schrödinger Equation in University of New Mexico May 14, 2010 Joint work with: Hart Smith (University of Washington) Christopher Sogge (Johns Hopkins University) The Schrödinger
More informationSharp estimates for a class of hyperbolic pseudo-differential equations
Results in Math., 41 (2002), 361-368. Sharp estimates for a class of hyperbolic pseudo-differential equations Michael Ruzhansky Abstract In this paper we consider the Cauchy problem for a class of hyperbolic
More informationDecouplings and applications
April 27, 2018 Let Ξ be a collection of frequency points ξ on some curved, compact manifold S of diameter 1 in R n (e.g. the unit sphere S n 1 ) Let B R = B(c, R) be a ball with radius R 1. Let also a
More informationResearch Statement. Xiangjin Xu. 1. My thesis work
Research Statement Xiangjin Xu My main research interest is twofold. First I am interested in Harmonic Analysis on manifolds. More precisely, in my thesis, I studied the L estimates and gradient estimates
More informationarxiv: v1 [math.ap] 18 May 2017
Littlewood-Paley-Stein functions for Schrödinger operators arxiv:175.6794v1 [math.ap] 18 May 217 El Maati Ouhabaz Dedicated to the memory of Abdelghani Bellouquid (2/2/1966 8/31/215) Abstract We study
More informationON THE PROBABILISTIC CAUCHY THEORY FOR NONLINEAR DISPERSIVE PDES
ON THE PROBABILISTIC CAUCHY THEORY FOR NONLINEAR DISPERSIVE PDES ÁRPÁD BÉNYI, TADAHIRO OH, AND OANA POCOVNICU Abstract. In this note, we review some of the recent developments in the well-posedness theory
More informationEigenvalues and eigenfunctions of the Laplacian. Andrew Hassell
Eigenvalues and eigenfunctions of the Laplacian Andrew Hassell 1 2 The setting In this talk I will consider the Laplace operator,, on various geometric spaces M. Here, M will be either a bounded Euclidean
More informationDispersive Equations and Hyperbolic Orbits
Dispersive Equations and Hyperbolic Orbits H. Christianson Department of Mathematics University of California, Berkeley 4/16/07 The Johns Hopkins University Outline 1 Introduction 3 Applications 2 Main
More informationSYMMETRY RESULTS FOR PERTURBED PROBLEMS AND RELATED QUESTIONS. Massimo Grosi Filomena Pacella S. L. Yadava. 1. Introduction
Topological Methods in Nonlinear Analysis Journal of the Juliusz Schauder Center Volume 21, 2003, 211 226 SYMMETRY RESULTS FOR PERTURBED PROBLEMS AND RELATED QUESTIONS Massimo Grosi Filomena Pacella S.
More informationA COUNTEREXAMPLE TO AN ENDPOINT BILINEAR STRICHARTZ INEQUALITY TERENCE TAO. t L x (R R2 ) f L 2 x (R2 )
Electronic Journal of Differential Equations, Vol. 2006(2006), No. 5, pp. 6. ISSN: 072-669. URL: http://ejde.math.txstate.edu or http://ejde.math.unt.edu ftp ejde.math.txstate.edu (login: ftp) A COUNTEREXAMPLE
More informationWell-posedness for the Fourth-order Schrödinger Equations with Quadratic Nonlinearity
Well-posedness for the Fourth-order Schrödinger Equations with Quadratic Nonlinearity Jiqiang Zheng The Graduate School of China Academy of Engineering Physics P. O. Box 20, Beijing, China, 00088 (zhengjiqiang@gmail.com)
More informationA REMARK ON MINIMAL NODAL SOLUTIONS OF AN ELLIPTIC PROBLEM IN A BALL. Olaf Torné. 1. Introduction
Topological Methods in Nonlinear Analysis Journal of the Juliusz Schauder Center Volume 24, 2004, 199 207 A REMARK ON MINIMAL NODAL SOLUTIONS OF AN ELLIPTIC PROBLEM IN A BALL Olaf Torné (Submitted by Michel
More informationDuality of multiparameter Hardy spaces H p on spaces of homogeneous type
Duality of multiparameter Hardy spaces H p on spaces of homogeneous type Yongsheng Han, Ji Li, and Guozhen Lu Department of Mathematics Vanderbilt University Nashville, TN Internet Analysis Seminar 2012
More informationDISPERSIVE EQUATIONS: A SURVEY
DISPERSIVE EQUATIONS: A SURVEY GIGLIOLA STAFFILANI 1. Introduction These notes were written as a guideline for a short talk; hence, the references and the statements of the theorems are often not given
More informationEndpoint resolvent estimates for compact Riemannian manifolds
Endpoint resolvent estimates for compact Riemannian manifolds joint work with R. L. Frank to appear in J. Funct. Anal. (arxiv:6.00462) Lukas Schimmer California Institute of Technology 3 February 207 Schimmer
More informationScattering theory for nonlinear Schrödinger equation with inverse square potential
Scattering theory for nonlinear Schrödinger equation with inverse square potential Université Nice Sophia-Antipolis Based on joint work with: Changxing Miao (IAPCM) and Junyong Zhang (BIT) February -6,
More informationSHARP BOUNDARY TRACE INEQUALITIES. 1. Introduction
SHARP BOUNDARY TRACE INEQUALITIES GILES AUCHMUTY Abstract. This paper describes sharp inequalities for the trace of Sobolev functions on the boundary of a bounded region R N. The inequalities bound (semi-)norms
More informationNon-radial solutions to a bi-harmonic equation with negative exponent
Non-radial solutions to a bi-harmonic equation with negative exponent Ali Hyder Department of Mathematics, University of British Columbia, Vancouver BC V6TZ2, Canada ali.hyder@math.ubc.ca Juncheng Wei
More informationResearch Statement. Yakun Xi
Research Statement Yakun Xi 1 Introduction My research interests lie in harmonic and geometric analysis, and in particular, the Kakeya- Nikodym family of problems and eigenfunction estimates on compact
More informationSharp Sobolev Strichartz estimates for the free Schrödinger propagator
Sharp Sobolev Strichartz estimates for the free Schrödinger propagator Neal Bez, Chris Jeavons and Nikolaos Pattakos Abstract. We consider gaussian extremisability of sharp linear Sobolev Strichartz estimates
More informationGlobal well-posedness for KdV in Sobolev spaces of negative index
Electronic Journal of Differential Equations, Vol. (), No. 6, pp. 7. ISSN: 7-669. URL: http://ejde.math.swt.edu or http://ejde.math.unt.edu ftp ejde.math.swt.edu (login: ftp) Global well-posedness for
More informationMEAN CURVATURE FLOW OF ENTIRE GRAPHS EVOLVING AWAY FROM THE HEAT FLOW
MEAN CURVATURE FLOW OF ENTIRE GRAPHS EVOLVING AWAY FROM THE HEAT FLOW GREGORY DRUGAN AND XUAN HIEN NGUYEN Abstract. We present two initial graphs over the entire R n, n 2 for which the mean curvature flow
More informationTHE L 2 -HODGE THEORY AND REPRESENTATION ON R n
THE L 2 -HODGE THEORY AND REPRESENTATION ON R n BAISHENG YAN Abstract. We present an elementary L 2 -Hodge theory on whole R n based on the minimization principle of the calculus of variations and some
More informationWave equation on manifolds and finite speed of propagation
Wave equation on manifolds and finite speed of propagation Ethan Y. Jaffe Let M be a Riemannian manifold (without boundary), and let be the (negative of) the Laplace-Beltrami operator. In this note, we
More informationA RELATIONSHIP BETWEEN THE DIRICHLET AND REGULARITY PROBLEMS FOR ELLIPTIC EQUATIONS. Zhongwei Shen
A RELATIONSHIP BETWEEN THE DIRICHLET AND REGULARITY PROBLEMS FOR ELLIPTIC EQUATIONS Zhongwei Shen Abstract. Let L = diva be a real, symmetric second order elliptic operator with bounded measurable coefficients.
More informationSome physical space heuristics for Strichartz estimates
Some physical space heuristics for Strichartz estimates Felipe Hernandez July 30, 2014 SPUR Final Paper, Summer 2014 Mentor Chenjie Fan Project suggested by Gigliola Staffilani Abstract This note records
More informationJUHA KINNUNEN. Harmonic Analysis
JUHA KINNUNEN Harmonic Analysis Department of Mathematics and Systems Analysis, Aalto University 27 Contents Calderón-Zygmund decomposition. Dyadic subcubes of a cube.........................2 Dyadic cubes
More informationON WEAKLY NONLINEAR BACKWARD PARABOLIC PROBLEM
ON WEAKLY NONLINEAR BACKWARD PARABOLIC PROBLEM OLEG ZUBELEVICH DEPARTMENT OF MATHEMATICS THE BUDGET AND TREASURY ACADEMY OF THE MINISTRY OF FINANCE OF THE RUSSIAN FEDERATION 7, ZLATOUSTINSKY MALIY PER.,
More informationDECOUPLING INEQUALITIES IN HARMONIC ANALYSIS AND APPLICATIONS
DECOUPLING INEQUALITIES IN HARMONIC ANALYSIS AND APPLICATIONS 1 NOTATION AND STATEMENT S compact smooth hypersurface in R n with positive definite second fundamental form ( Examples: sphere S d 1, truncated
More informationDeviation Measures and Normals of Convex Bodies
Beiträge zur Algebra und Geometrie Contributions to Algebra Geometry Volume 45 (2004), No. 1, 155-167. Deviation Measures Normals of Convex Bodies Dedicated to Professor August Florian on the occasion
More informationA survey on l 2 decoupling
A survey on l 2 decoupling Po-Lam Yung 1 The Chinese University of Hong Kong January 31, 2018 1 Research partially supported by HKRGC grant 14313716, and by CUHK direct grants 4053220, 4441563 Introduction
More informationStrichartz estimates for the Schrödinger equation on polygonal domains
estimates for the Schrödinger equation on Joint work with Matt Blair (UNM), G. Austin Ford (Northwestern U) and Sebastian Herr (U Bonn and U Düsseldorf)... With a discussion of previous work with Andrew
More informationREAL PROJECTIVE SPACES WITH ALL GEODESICS CLOSED
REAL PROJECTIVE SPACES WITH ALL GEODESICS CLOSED Abstract. Let M be a smooth n-manifold admitting an even degree smooth covering by a smooth homotopy n-sphere. When n 3, we prove that if g is a Riemannian
More informationStrauss conjecture for nontrapping obstacles
Chengbo Wang Joint work with: Hart Smith, Christopher Sogge Department of Mathematics Johns Hopkins University Baltimore, Maryland 21218 wangcbo@jhu.edu November 3, 2010 1 Problem and Background Problem
More informationSPECTRAL PROPERTIES OF THE LAPLACIAN ON BOUNDED DOMAINS
SPECTRAL PROPERTIES OF THE LAPLACIAN ON BOUNDED DOMAINS TSOGTGEREL GANTUMUR Abstract. After establishing discrete spectra for a large class of elliptic operators, we present some fundamental spectral properties
More informationA SHORT PROOF OF THE COIFMAN-MEYER MULTILINEAR THEOREM
A SHORT PROOF OF THE COIFMAN-MEYER MULTILINEAR THEOREM CAMIL MUSCALU, JILL PIPHER, TERENCE TAO, AND CHRISTOPH THIELE Abstract. We give a short proof of the well known Coifman-Meyer theorem on multilinear
More informationNew Proof of Hörmander multiplier Theorem on compact manifolds without boundary
New Proof of Hörmander multiplier Theorem on compact manifolds without boundary Xiangjin Xu Department of athematics Johns Hopkins University Baltimore, D, 21218, USA xxu@math.jhu.edu Abstract On compact
More informationOn Estimates of Biharmonic Functions on Lipschitz and Convex Domains
The Journal of Geometric Analysis Volume 16, Number 4, 2006 On Estimates of Biharmonic Functions on Lipschitz and Convex Domains By Zhongwei Shen ABSTRACT. Using Maz ya type integral identities with power
More informationStrong uniqueness for second order elliptic operators with Gevrey coefficients
Strong uniqueness for second order elliptic operators with Gevrey coefficients Ferruccio Colombini, Cataldo Grammatico, Daniel Tataru Abstract We consider here the problem of strong unique continuation
More informationDerivatives of Harmonic Bergman and Bloch Functions on the Ball
Journal of Mathematical Analysis and Applications 26, 1 123 (21) doi:1.16/jmaa.2.7438, available online at http://www.idealibrary.com on Derivatives of Harmonic ergman and loch Functions on the all oo
More informationMicrolocal analysis and inverse problems Lecture 3 : Carleman estimates
Microlocal analysis and inverse problems ecture 3 : Carleman estimates David Dos Santos Ferreira AGA Université de Paris 13 Monday May 16 Instituto de Ciencias Matemáticas, Madrid David Dos Santos Ferreira
More informationRigidity and Non-rigidity Results on the Sphere
Rigidity and Non-rigidity Results on the Sphere Fengbo Hang Xiaodong Wang Department of Mathematics Michigan State University Oct., 00 1 Introduction It is a simple consequence of the maximum principle
More informationSolutions to the Nonlinear Schrödinger Equation in Hyperbolic Space
Solutions to the Nonlinear Schrödinger Equation in Hyperbolic Space SPUR Final Paper, Summer 2014 Peter Kleinhenz Mentor: Chenjie Fan Project suggested by Gigliola Staffilani July 30th, 2014 Abstract In
More informationDETERMINATION OF THE BLOW-UP RATE FOR THE SEMILINEAR WAVE EQUATION
DETERMINATION OF THE LOW-UP RATE FOR THE SEMILINEAR WAVE EQUATION y FRANK MERLE and HATEM ZAAG Abstract. In this paper, we find the optimal blow-up rate for the semilinear wave equation with a power nonlinearity.
More informationUNIQUENESS RESULTS ON SURFACES WITH BOUNDARY
UNIQUENESS RESULTS ON SURFACES WITH BOUNDARY XIAODONG WANG. Introduction The following theorem is proved by Bidaut-Veron and Veron [BVV]. Theorem. Let (M n, g) be a compact Riemannian manifold and u C
More informationarxiv:math/ v1 [math.ap] 24 Apr 2003
ICM 2002 Vol. III 1 3 arxiv:math/0304397v1 [math.ap] 24 Apr 2003 Nonlinear Wave Equations Daniel Tataru Abstract The analysis of nonlinear wave equations has experienced a dramatic growth in the last ten
More informationStrichartz Estimates in Domains
Department of Mathematics Johns Hopkins University April 15, 2010 Wave equation on Riemannian manifold (M, g) Cauchy problem: 2 t u(t, x) gu(t, x) =0 u(0, x) =f (x), t u(0, x) =g(x) Strichartz estimates:
More informationGlobal solutions for the cubic non linear wave equation
Global solutions for the cubic non linear wave equation Nicolas Burq Université Paris-Sud, Laboratoire de Mathématiques d Orsay, CNRS, UMR 8628, FRANCE and Ecole Normale Supérieure Oxford sept 12th, 2012
More informationA LOWER BOUND ON BLOWUP RATES FOR THE 3D INCOMPRESSIBLE EULER EQUATION AND A SINGLE EXPONENTIAL BEALE-KATO-MAJDA ESTIMATE. 1.
A LOWER BOUND ON BLOWUP RATES FOR THE 3D INCOMPRESSIBLE EULER EQUATION AND A SINGLE EXPONENTIAL BEALE-KATO-MAJDA ESTIMATE THOMAS CHEN AND NATAŠA PAVLOVIĆ Abstract. We prove a Beale-Kato-Majda criterion
More informationON BOUNDEDNESS OF MAXIMAL FUNCTIONS IN SOBOLEV SPACES
Annales Academiæ Scientiarum Fennicæ Mathematica Volumen 29, 2004, 167 176 ON BOUNDEDNESS OF MAXIMAL FUNCTIONS IN SOBOLEV SPACES Piotr Haj lasz and Jani Onninen Warsaw University, Institute of Mathematics
More informationPiecewise Smooth Solutions to the Burgers-Hilbert Equation
Piecewise Smooth Solutions to the Burgers-Hilbert Equation Alberto Bressan and Tianyou Zhang Department of Mathematics, Penn State University, University Park, Pa 68, USA e-mails: bressan@mathpsuedu, zhang
More informationThe Dirichlet s P rinciple. In this lecture we discuss an alternative formulation of the Dirichlet problem for the Laplace equation:
Oct. 1 The Dirichlet s P rinciple In this lecture we discuss an alternative formulation of the Dirichlet problem for the Laplace equation: 1. Dirichlet s Principle. u = in, u = g on. ( 1 ) If we multiply
More informationSCALE INVARIANT FOURIER RESTRICTION TO A HYPERBOLIC SURFACE
SCALE INVARIANT FOURIER RESTRICTION TO A HYPERBOLIC SURFACE BETSY STOVALL Abstract. This result sharpens the bilinear to linear deduction of Lee and Vargas for extension estimates on the hyperbolic paraboloid
More informationThe spectral zeta function
The spectral zeta function Bernd Ammann June 4, 215 Abstract In this talk we introduce spectral zeta functions. The spectral zeta function of the Laplace-Beltrami operator was already introduced by Minakshisundaram
More informationLARGE DEVIATIONS OF TYPICAL LINEAR FUNCTIONALS ON A CONVEX BODY WITH UNCONDITIONAL BASIS. S. G. Bobkov and F. L. Nazarov. September 25, 2011
LARGE DEVIATIONS OF TYPICAL LINEAR FUNCTIONALS ON A CONVEX BODY WITH UNCONDITIONAL BASIS S. G. Bobkov and F. L. Nazarov September 25, 20 Abstract We study large deviations of linear functionals on an isotropic
More informationERRATUM TO AFFINE MANIFOLDS, SYZ GEOMETRY AND THE Y VERTEX
ERRATUM TO AFFINE MANIFOLDS, SYZ GEOMETRY AND THE Y VERTEX JOHN LOFTIN, SHING-TUNG YAU, AND ERIC ZASLOW 1. Main result The purpose of this erratum is to correct an error in the proof of the main result
More informationON THE CAUCHY-PROBLEM FOR GENERALIZED KADOMTSEV-PETVIASHVILI-II EQUATIONS
Electronic Journal of Differential Equations, Vol. 009(009), No. 8, pp. 1 9. ISSN: 107-6691. URL: http://ejde.math.tstate.edu or http://ejde.math.unt.edu ftp ejde.math.tstate.edu ON THE CAUCHY-PROBLEM
More informationRIGIDITY OF STATIONARY BLACK HOLES WITH SMALL ANGULAR MOMENTUM ON THE HORIZON
RIGIDITY OF STATIONARY BLACK HOLES WITH SMALL ANGULAR MOMENTUM ON THE HORIZON S. ALEXAKIS, A. D. IONESCU, AND S. KLAINERMAN Abstract. We prove a black hole rigidity result for slowly rotating stationary
More informationFinite-dimensional spaces. C n is the space of n-tuples x = (x 1,..., x n ) of complex numbers. It is a Hilbert space with the inner product
Chapter 4 Hilbert Spaces 4.1 Inner Product Spaces Inner Product Space. A complex vector space E is called an inner product space (or a pre-hilbert space, or a unitary space) if there is a mapping (, )
More informationFunctional Analysis. Franck Sueur Metric spaces Definitions Completeness Compactness Separability...
Functional Analysis Franck Sueur 2018-2019 Contents 1 Metric spaces 1 1.1 Definitions........................................ 1 1.2 Completeness...................................... 3 1.3 Compactness......................................
More informationASYMPTOTIC BEHAVIOR OF GENERALIZED EIGENFUNCTIONS IN N-BODY SCATTERING
ASYMPTOTIC BEHAVIOR OF GENERALIZED EIGENFUNCTIONS IN N-BODY SCATTERING ANDRAS VASY Abstract. In this paper an asymptotic expansion is proved for locally (at infinity) outgoing functions on asymptotically
More informationCONSIDERATION OF COMPACT MINIMAL SURFACES IN 4-DIMENSIONAL FLAT TORI IN TERMS OF DEGENERATE GAUSS MAP
CONSIDERATION OF COMPACT MINIMAL SURFACES IN 4-DIMENSIONAL FLAT TORI IN TERMS OF DEGENERATE GAUSS MAP TOSHIHIRO SHODA Abstract. In this paper, we study a compact minimal surface in a 4-dimensional flat
More informationVISCOSITY SOLUTIONS. We follow Han and Lin, Elliptic Partial Differential Equations, 5.
VISCOSITY SOLUTIONS PETER HINTZ We follow Han and Lin, Elliptic Partial Differential Equations, 5. 1. Motivation Throughout, we will assume that Ω R n is a bounded and connected domain and that a ij C(Ω)
More informationCourse Description for Real Analysis, Math 156
Course Description for Real Analysis, Math 156 In this class, we will study elliptic PDE, Fourier analysis, and dispersive PDE. Here is a quick summary of the topics will study study. They re described
More informationMinimization problems on the Hardy-Sobolev inequality
manuscript No. (will be inserted by the editor) Minimization problems on the Hardy-Sobolev inequality Masato Hashizume Received: date / Accepted: date Abstract We study minimization problems on Hardy-Sobolev
More informationGAUSSIAN MEASURE OF SECTIONS OF DILATES AND TRANSLATIONS OF CONVEX BODIES. 2π) n
GAUSSIAN MEASURE OF SECTIONS OF DILATES AND TRANSLATIONS OF CONVEX BODIES. A. ZVAVITCH Abstract. In this paper we give a solution for the Gaussian version of the Busemann-Petty problem with additional
More informationCounting geodesic arcs in a fixed conjugacy class on negatively curved surfaces with boundary
Counting geodesic arcs in a fixed conjugacy class on negatively curved surfaces with boundary Mark Pollicott Abstract We show how to derive an asymptotic estimates for the number of closed arcs γ on a
More informationarxiv: v1 [math.ca] 7 Aug 2015
THE WHITNEY EXTENSION THEOREM IN HIGH DIMENSIONS ALAN CHANG arxiv:1508.01779v1 [math.ca] 7 Aug 2015 Abstract. We prove a variant of the standard Whitney extension theorem for C m (R n ), in which the norm
More informationBielefeld Course on Nonlinear Waves - June 29, Department of Mathematics University of North Carolina, Chapel Hill. Solitons on Manifolds
Joint work (on various projects) with Pierre Albin (UIUC), Hans Christianson (UNC), Jason Metcalfe (UNC), Michael Taylor (UNC), Laurent Thomann (Nantes) Department of Mathematics University of North Carolina,
More informationBILINEAR EIGENFUNCTION ESTIMATES AND THE NONLINEAR SCHRÖDINGER EQUATION ON SURFACES
BILINEAR EIGENFUNCTION ESTIMATES AND THE NONLINEAR SCHRÖDINGER EQUATION ON SURFACES by N. Burq, P. Gérard & N. Tzvetkov Abstract. We study the cubic non linear Schrödinger equation (NLS) on compact surfaces.
More informationEigenfunction L p Estimates on Manifolds of Constant Negative Curvature
Eigenfunction L p Estimates on Manifolds of Constant Negative Curvature Melissa Tacy Department of Mathematics Australian National University melissa.tacy@anu.edu.au July 2010 Joint with Andrew Hassell
More informationSCATTERING FOR THE TWO-DIMENSIONAL NLS WITH EXPONENTIAL NONLINEARITY
SCATTERING FOR THE TWO-DIMENSIONAL NLS WITH EXPONENTIAL NONLINEARITY S. IBRAHIM, M. MAJDOUB, N. MASMOUDI, AND K. NAKANISHI Abstract. We investigate existence and asymptotic completeness of the wave operators
More informationThe oblique derivative problem for general elliptic systems in Lipschitz domains
M. MITREA The oblique derivative problem for general elliptic systems in Lipschitz domains Let M be a smooth, oriented, connected, compact, boundaryless manifold of real dimension m, and let T M and T
More informationRandom Bernstein-Markov factors
Random Bernstein-Markov factors Igor Pritsker and Koushik Ramachandran October 20, 208 Abstract For a polynomial P n of degree n, Bernstein s inequality states that P n n P n for all L p norms on the unit
More informationTHE FORM SUM AND THE FRIEDRICHS EXTENSION OF SCHRÖDINGER-TYPE OPERATORS ON RIEMANNIAN MANIFOLDS
THE FORM SUM AND THE FRIEDRICHS EXTENSION OF SCHRÖDINGER-TYPE OPERATORS ON RIEMANNIAN MANIFOLDS OGNJEN MILATOVIC Abstract. We consider H V = M +V, where (M, g) is a Riemannian manifold (not necessarily
More informationLaplace s Equation. Chapter Mean Value Formulas
Chapter 1 Laplace s Equation Let be an open set in R n. A function u C 2 () is called harmonic in if it satisfies Laplace s equation n (1.1) u := D ii u = 0 in. i=1 A function u C 2 () is called subharmonic
More informationSPECTRAL THEOREM FOR COMPACT SELF-ADJOINT OPERATORS
SPECTRAL THEOREM FOR COMPACT SELF-ADJOINT OPERATORS G. RAMESH Contents Introduction 1 1. Bounded Operators 1 1.3. Examples 3 2. Compact Operators 5 2.1. Properties 6 3. The Spectral Theorem 9 3.3. Self-adjoint
More informationDaniel M. Oberlin Department of Mathematics, Florida State University. January 2005
PACKING SPHERES AND FRACTAL STRICHARTZ ESTIMATES IN R d FOR d 3 Daniel M. Oberlin Department of Mathematics, Florida State University January 005 Fix a dimension d and for x R d and r > 0, let Sx, r) stand
More informationInequalities for the ADM-mass and capacity of asymptotically flat manifolds with minimal boundary
Inequalities for the ADM-mass and capacity of asymptotically flat manifolds with minimal boundary Fernando Schwartz Abstract. We present some recent developments involving inequalities for the ADM-mass
More informationANALYTIC SMOOTHING EFFECT FOR NONLI TitleSCHRÖDINGER EQUATION IN TWO SPACE DIMENSIONS. Citation Osaka Journal of Mathematics.
ANALYTIC SMOOTHING EFFECT FOR NONLI TitleSCHRÖDINGER EQUATION IN TWO SPACE DIMENSIONS Author(s) Hoshino, Gaku; Ozawa, Tohru Citation Osaka Journal of Mathematics. 51(3) Issue 014-07 Date Text Version publisher
More informationSYMMETRY IN REARRANGEMENT OPTIMIZATION PROBLEMS
Electronic Journal of Differential Equations, Vol. 2009(2009), No. 149, pp. 1 10. ISSN: 1072-6691. URL: http://ejde.math.txstate.edu or http://ejde.math.unt.edu ftp ejde.math.txstate.edu SYMMETRY IN REARRANGEMENT
More informationLocal semiconvexity of Kantorovich potentials on non-compact manifolds
Local semiconvexity of Kantorovich potentials on non-compact manifolds Alessio Figalli, Nicola Gigli Abstract We prove that any Kantorovich potential for the cost function c = d / on a Riemannian manifold
More informationTitle: Localized self-adjointness of Schrödinger-type operators on Riemannian manifolds. Proposed running head: Schrödinger-type operators on
Title: Localized self-adjointness of Schrödinger-type operators on Riemannian manifolds. Proposed running head: Schrödinger-type operators on manifolds. Author: Ognjen Milatovic Department Address: Department
More information