RECTIFIABILITY OF MEASURES WITH BOUNDED RIESZ TRANSFORM OPERATOR: FROM SINGULAR OPERATORS TO GEOMETRIC MEASURE THEORY
|
|
- Bartholomew Marsh
- 5 years ago
- Views:
Transcription
1 RECTIFIABILITY OF MEASURES WITH BOUNDED RIESZ TRANSFORM OPERATOR: FROM SINGULAR OPERATORS TO GEOMETRIC MEASURE THEORY ALEXANDER VOLBERG 1. Lecture 6: The abundance of flat cells We want to show the abundance of flat cells. First we will show the abundance of geometrically flat cells. The word abundance will be used in a very concrete sense. This word will almost mean that the cells which are not flat can be only rare (Carleson). But in fact, abundance means that we relax the meaning of pleasure, in what follows we will be glad and it will be pleasant to us if we meet any cell (not geometrically flat for that matter) such that a fixed number of generations down one of its descendant cell is geometrically flat. Abundance will mean that unpleasant cells are rare (Carleson). So, fix A > 1, α (0, 1), β > 0 to be chosen later. We want to show first that if N > N 0 (A, α, β), then there exists a Carleson family F 1 D and a finite set H of linear hyperplanes such that every cell P D \ F 1 contains a geometrically (H, 5A, α )-flat cell Q P at most N levels down from P for some linear hyperplane H H that may depend on P. Let R = 1 l(p ). According to the Geometric Flattening Lemma, we 16 can choose ρ > 0 so that either First Case. There is a scale l > ρr and a point z B(z P, R 16[(5A +5)+ α ]l) P such that µ is geometrically 3 (H, 16(5A +5), α )- 3 flat at z on the scale l for some linear hyperplane H, Second case. There exist (0, 1 ), δ (ρ, ) and a point z B(z P, (1 )R) with dist(z, supp µ) < δ R such that [R(ψ µ)](z) > 4 z,δr, R β, where ψ z,δr, R is ( ) ( ) x z x z ψ z,r,r (x) = ψ 0 ψ 0. R r Date: March 7,
2 ALEXANDER VOLBERG In the first case, take any point z supp µ such that z z < α l 3 and choose the cell Q with l(q) [l, 16l) that contains z. Since z B(z P, R) P and l(q) < l(p ), we must have Q P. Also, since z Q z 4l(Q), we have z z Q < 4l(Q) + α l < 5l(Q). 3 Note now that, if µ is geometrically (H, 16A, α)-flat at z on the scale l, then it is geometrically (H, A, α)-flat at z on every scale l [l, 16l). Note also that the geometric flatness is a stable condition with respect to shifts of the point and rotations of the plane. Applying these observations with l = l(q), z = z Q, ε = α, and 3A choosing any finite ε-net Y on the unit sphere, we see that µ is geometrically (H, 5A, α )-flat at z Q on the scale l(q) with some H whose unit normal belongs to Y. Note also that the number of levels between P and Q in this case is log 16 l(p ) l(q) log 16 ρ 1 + C. Explanation of shifting and rotating. More precisely, if µ is geometrically (H, A+5, α)-flat at z on the scale l, then it is geometrically (H, A, α + Aε)-flat at z on the scale l for every z B(z, 5l) supp µ and every linear hyperplane H with unit normal vector n such that the angle between n and the unit normal vector n to H is less than ε. To see it, it is important to observe first that, despite the distance from z to z may be quite large, the distance from z to the affine hyperplane L containing z and parallel to H can be only αl, so we do not need to shift L by more than this amount to make it pass through z. Combined with the inclusion B(z, Al) B(z, (A + 5)l), this allows us to conclude that µ is (H, A, α)-flat at z on the scale l. After this shift, we can rotate the plane L around the (d 1)-dimensional affine plane containing z and orthogonal to both n and n by an angle less than ε to make it parallel to H. Again, no point of L B(z, Al) will move by more than Aεl and the desired conclusion follows. If the Second case stated at page 1 of this lecture in fact happens, then there is a point z B(z P, (1 )R) and a point z supp µ, such that [R(ψ z,δr, R µ)](z) > β, z z < δ 4 R, where ( ) ( ) x z x z ψ z,r,r (x) = ψ 0 ψ 0. R r
3 RIESZ SINGULAR OPERATORS AND GMT 3 Let now Q and Q be the largest cells containing z under the restrictions that l(q) < R and 3 l(q ) < δ R. Since both bounds are less 3 than l(p ) and the first one is greater than the second one, we have Q Q P. Now we want to show that the difference of averages of R µ χ E over Q and Q is at least β C in absolute value for every set E B(z, R) and, hence, for every set E B(z P, 5l(P )). Here C depends only on the norm of operator R µ in L (µ). Estimate of the difference of averages R µ χ E Q R µ χ E Q. The function ψ z,δr, R is roughly characteristic function of the annulus. We can write χ E = ψ z,δr, R + f 1 + f where f 1, f 1 and supp f 1 B(z, δr), supp f B(z, R) =. So R µ f 1 dµ C f 1 dµ C(δR) d Cl(Q ) d Cµ(Q ). Hence R µ f 1 Q, R µ f 1 Q are bounded by some C. Note also that Q B(z, 8l(Q)) B(z, R) B(z, R), so the 4 distance from Q to supp f is at least R > l(q). Thus, R µ f Lip(Q) Cl(Q) 1 the difference of the averages of R µ f over Q and Q is bounded by some C. We are left to to estimate the difference of averages R µ ψ z,δr, R Q R µ ψ z,δr, R Q. For this R µ ψ z,δr, R L (µ) C ψ z,δr, R L (µ) C( R)d Cl(Q) d Cµ(Q), so the average over Q is bounded by a constant. On the other hand, Q B(z, 8l(Q )) B(z, δ 4 R) B(z, δ R). Again dist(supp ψ z,δr, R, Q ) δ R. Therefore, R(ψ z,δr, R µ) Lip(B(z, δ R)) C(δR) 1. But this means that R µ ψ z,δr, R Q R µ ψ z,δr, R (z) C(δ). The quantity R µ ψ z,δr, R (z) is large! It is bigger than β. We finally get R µ χ E Q R µ χ E Q β 3C.
4 4 ALEXANDER VOLBERG This conclusion can be rewritten as (1) µ(p ) 1 Rµ χ E, ψ P µ cρ d (β C) where () ψ P = [ρl(p )] d ( 1 µ(q) χ 1 ) Q µ(q ) χ. Q This is for any E, B(z P, 5l(P )) E. Let us show that the set of cells satisfying the latter property can be only rare, that is a Carleson family. Carlesonness of cells P satisfying the Second case of page 1 of this lecture. Fix any cell P 0 and consider the cells P satisfying the Second case of page 1 of this lecture. This means that there exists a point z such that R µ ψ z,δr, R (z) > β with certain position of z inside P, R l(p ), and large β. Then B(z P, 5l(P )) B(z P0, 50l(P 0 )). Also we saw in (1) that for such P one has (3) µ(p ) C(ρ, β) R µ χ B(zP0,50l(P 0 )), ψ P µ. Here ψ P form Haar system of depth N log l(p ), l(q ) l(q ) δl(p ), δ (ρ, 1/), so N c log 1 (see the definition below). ρ Any Haar system of depth N is a Riesz system. By the property of Riesz system (see below) we get that (4) µ(p ) C(ρ, β) R µ χ, ψ B(zP0,50l(P 0 )) P µ P P 0 P P 0 (5) C R µ χ B(zP0,50l(P 0 )) µ. The latter is smaller than Cµ(B(z P0, 50l(P 0 ))) C µ(p 0 ), and we established Carleson property of P s as above. Abundance of geometrically flat cells is already obtained up to the understanding what is the Riesz system and what is Haar systems of depth N, and why the latter is an example of the former. In fact, fix A, α > 0. We shall say that a cell Q D is (geometrically) (H, A, α)-flat if the measure µ is (geometrically) (H, A, α)-flat at z Q on the scale l(q). We have just shown (modulo estimates of Riesz system that follows) that there exists an integer N, a finite set H of linear hyperplanes in R d+1, and a Carleson family F D (depending on A, α) such that for every cell P D \ F, there exist H H and a geometrically (H, A, α)-flat cell Q P that is at most N levels down from P.
5 RIESZ SINGULAR OPERATORS AND GMT 5 Riesz systems: Haar system of a given depth, Lipschitz wavelet system. Let ψ Q (Q D) be a system of L (µ) functions. Definition 1. The functions ψ Q form a Riesz family with Riesz constant C > 0 if a Q ψ Q C a Q Q D Q D for any real coefficients a Q. L (µ) Note that if the functions ψ Q form a Riesz family with Riesz constant C, then for every f L (µ), we have f, ψ Q µ C f. L (µ) Q D Assume next that for each cell Q D we have a set Ψ Q of L (µ) functions associated with Q. Definition. The family Ψ Q (Q D) of sets of functions is a Riesz system with Riesz constant C > 0 if for every choice of functions ψ Q Ψ Q, the functions ψ Q form a Riesz family with Riesz constant C. Riesz systems are useful because of the following Lemma. Lemma 1. Suppose R µ is bounded in L (µ). Suppose that Ψ Q is any Riesz system. Fix A > 1. For each Q D, define ξ(q) = inf sup µ(q) 1/ R µ χ E:B(z,Al(Q)) E,µ(E)<+ E, ψ µ. Q ψ Ψ Q Then δ > 0, F δ := {Q D : ξ(q) δ} is Carleson. Proof. Fix a cell P 0. Then E = B(z P0, (50A + 50)l(P 0 )) satisfies B(z P, Al(P )) B(z P0, (50A + 50)l(P 0 )). Therefore, µ(p ) δ R µ χ, ψ B(zP0,(50A+50)l(P 0 )) P µ P P 0 P P 0 C R µ χ B(zP0,(50A+50)l(P 0 )) µ Cµ(P 0 ). It is important that there are two natural classes of Riesz systems: Haar systems of fixed depth Ψ H (N), and Lipschitz wavelet systems Ψ L (A).
6 6 ALEXANDER VOLBERG Let now N be any positive integer. For each Q D, define the set of Haar functions Ψ h Q (N) of depth N as the set of all functions ψ that are supported on Q, are constant on every cell Q D that is N levels down from Q, and satisfy ψ dµ = 0, ψ dµ C. The Riesz property follows immediately from the fact that D can be represented as a finite union of the sets D (j) = k:k j mod N D k (j = 0,..., N 1) and that for every choice of ψ Q Ψ h Q (N), the functions ψ corresponding to the Q cells Q from a fixed D ( (j) form a bounded) orthogonal family. Our ψ P = [ρl(p )] d 1 χ 1 χ from () are obviously from µ(q) Q µ(q ) Q Ψ H (N) with N c log 1, so the second inequality in (4) is done, and ρ the abundance of geometrically flat cells is completely established. Lipschitz wavelet systems. We will need then to establish the abundance of (H, A, α) flat (not just geometrically flat) cells. In the Lipschitz wavelet system, the set Ψ l Q (A) consists of all Lipschitz functions ψ supported on B(z Q, Al(Q)) such that ψ dµ = 0 and ψ Cl(Q) d 1. Since µ is nice, we automatically have Lip ψ dµ C(A)l(Q) d µ(q) C(A) in this case. If Q, Q D and l(q ) l(q), then, for any two functions ψ Q Ψ l Q (A) and ψ Ψ l Q Q (A), we can have ψ, ψ Q Q µ 0 only if B(z Q, Al(Q)) B(z Q, Al(Q )), in which case, ψ Q, ψ Q µ ψ Q Lip diam(q ) ψ Q L 1 (µ) C(A) Then: a Q ψ Q Q D C(A) C(A) L (µ) Q,Q D, l(q ) l(q) Q,Q D, l(q ) l(q) B(z Q,Al(Q)) B(z Q,Al(Q )) Q,Q D, l(q ) l(q) B(z Q,Al(Q)) B(z Q,Al(Q )) [ ] l(q d ) +1. l(q) a Q a Q ψ Q, ψ Q µ [ ] l(q d ) +1 a l(q) Q a Q { [l(q ] d+1 ) a l(q) Q + l(q ) l(q) a Q }.
7 Q D: l(q ) l(q) B(z Q,Al(Q)) B(z Q,Al(Q )) RIESZ SINGULAR OPERATORS AND GMT 7 [ ] l(q d+1 ) C, l(q) Q D: l(q ) l(q) B(z Q,Al(Q)) B(z Q,Al(Q )) l(q ) l(q) C ).l(q l(q). We recall Flattening Lemma from Lecture 5, that says how to get flat cell if it is already geometrically flat. Lemma. Fix four positive parameters A, α, c, C. A, α > 0 depending on A, α, c, C and d such that: if H is a linear hyperplane in R d+1, z R d+1, L is the affine hyperplane containing z and parallel to H, l > 0, and µ is a C-good finite measure in R d+1 that is AD regular in B(z, 5A l) with the lower regularity constant c. Assume that µ is geometrically (H, 5A, α )-flat at z on the scale l and, in addition, for every (vector-valued) Lipschitz function g with supp g B(z, 5A l), g Lip l 1, and g dµ = 0, one has R H µ 1, g µ α l d. Then µ is (H, A, α)-flat at z on the scale l. We already saw that all cells P (except for a rare (Carleson) family F 1 ) are such that not more than N generation down inside P a cell Q lies, which is (H, A, α )-geometrically flat, where A, α depend on A, α as Flattening Lemma requires, and H = H Q belongs to H, a finite family (cardinality of it depends on A, α too). Given P, we find such Q, and Flattening Lemma applied to any µ := µ 1 E, E B(z Q, 100A l(q)), shows that either Q is (H, A, α)- flat, or for each such E there exists a function g = g E such that it is supported on B(z Q, 5A l(q)), g dµ = 0, Lipschitz with norm at most 1/l(Q) C(N)/l(P ) and R H µ 1 E, g α l(q) d = c(n)α l(p ) d. Consider ψ P = ψ P,E = g/l(p ) d. They form a Lipschitz wavelet system Ψ L (C), as on page 6 of this lecture. Therefore, ξ(p ) = µ(p ) 1 inf sup E : E B(z p,cl(p )) ψ Ψ L (C) R µ 1 E, ψ C(N)α. We know by Lemma 1 of this lecture that such P can form only a rare (Carleson) family if R µ is a bounded operator in L (µ). Call it F. So by the exception of two rare families F 1, F, any other cell P D will have inside it and not more than N (fixed number depending on A, α) generations down a sub-cell Q, which is (H, A, α)-flat. Here H will be
8 8 ALEXANDER VOLBERG chosen from a finite family H of hyperplanes (having fixed cardinality depending on A, α). The abundance of flat cells is completely proved. References [Carl] L. Carleson, Selected Problems on Exceptional Sets, Van Nostrand, [Ch] M. Christ, A T (b) theorem with remarks on analytic capacity and the Cauchy integral, Colloq. Math. 60/61, 1990, pp [D] G. David, Wavelets and singular integrals on curves and surfaces, Lecture Notes in Mathematics, vol. 1465, Springer-Verlag, [D1] G. David, Unrectifiable 1-sets have vanishing analytic capacity, Revista Mat. Iberoamericana, 14(), 1998, pp [Da4] G. David, Wavelets and singular integrals on curves and surfaces, Lecture Notes in Math. 1465, Springer-Verlag, Berlin, [DM] G. David and P. Mattila. Removable sets for Lipschitz harmonic functions in the plane. Rev. Mat. Iberoamericana 16(1) (000), [DS] G. David, S. Semmes, Analysis of and on uniformly rectifiable sets, Mathematical Surveys and Monographs, Volume 38, 1993, AMS, Providence, RI. [ENV] V. Eiderman, F. Nazarov, A. Volberg, The s-riesz transform of an s- dimensional measure in R is unbounded for 1 < s <, available from [Fa] H. Farag, The Riesz kernels do not give rise to higher-dimensional analogues of the Menger-Melnikov curvature, Publ. Mat. 43 (1999), no. 1, [Fe] H. Federer, Geometric Measure Theory, Springer [HMM] S. Hofmann, J. M. Martell, S. Mayboroda, Uniform rectifiability and harmonic measure III: Riesz transform bounds imply uniform rectifiability of [PJ] boundaries of 1-sided NTA domains, P.W. Jones, Rectifiable sets and the traveling salesman problem, Invent. Math. 10 (1990), [Law] Lawler, E.L.: The Traveling Salesman Problem. New York: Wileylnterscience, [Le] J. C. Léger, Menger curvature and rectifiability, Ann. of Math. 149 (1999), [KO] [Ma] [MMV] [MPa] K. Okikiolu, Characterization of subsets of rectifiable sets in R n, J. London Math. Soc., () 46 (199), pp P. Mattila. Geometry of sets and measures in Euclidean spaces, Cambridge Stud. Adv. Math. 44, Cambridge Univ. Press, Cambridge, P. Mattila, M. Melnikov, J. Verdera, The Cauchy integral, analytic capacity, and uniform rectifiability, Ann. of Math. () 144, 1996, pp P. Mattila and P.V. Paramonov. On geometric properties of harmonic Lip1-capacity, Pacific J. Math. 171: (1995), [NToV1] F. Nazarov, X. Tolsa and A. Volberg, On the uniform rectifiability of AD-regular measures with bounded Riesz transform operator: the case of codimension 1, arxiv:11.59, to appear in Acta Math.
9 RIESZ SINGULAR OPERATORS AND GMT 9 [NToV] F. Nazarov, X. Tolsa and A. Volberg, The Riesz transform, rectifiability, and removability for Lipschitz harmonic functions, arxiv: , to appear in Publ. Mat. [NTV] F. Nazarov, S. Treil and A. Volberg, The Tb-theorem on non- homogeneous spaces that proves a conjecture of Vitushkin. Preprint of 000 available at or arxiv: [NTrV1] F. Nazarov, S. Treil and A. Volberg, Weak type estimates and Cotlar inequalities for Calderón-Zygmund operators in nonhomogeneous spaces, Int. Math. Res. Notices 9 (1998), [Paj] [Pr] [PS] [RS] [T1] [T] [T3] [T-b] [Vo] H. Pajot, Théorème de recouvrement par des ensembles Ahlfors-réguliers et capacité analytique. (French) C. R. Acad. Sci. Paris Sér. I Math. 33 (1996), no., L. Prat, Potential theory of signed Riesz kernels: capacity and Hausdorff measure. Int. Math. Res. Not. 004, no. 19, Preparata, F.P., Shamos, M.I.: Computational Geometry. Berlin Heidelberg New York: Springer Subsets of Rectifiable curves in Hilbert Space-The Analyst s TSP, arxiv:math/060675, J. Anal. Math. 103 (007), X. Tolsa, Painlevé s problem and the semiadditivity of analytic capacity, Acta Math. 190:1 (003), X. Tolsa, Uniform rectifiability, Calderón Zygmund operators with odd kernels, and quasiorthogonality, Proc. London Math. Soc. 98(), 009, pp X. Tolsa, Principal values for Riesz transform and rectifiability, J. Func. Anal. vol. 54(7), 008, pp X. Tolsa, Analytic capacity, the Cauchy transform, and non-homogeneous Calderón-Zygmund theory. To appear (01). A. Volberg, Calderón-Zygmund capacities and operators on nonhomogeneous spaces. CBMS Regional Conf. Ser. in Math. 100, Amer. Math. Soc., Providence, 003. Alexander Volberg, Department of Mathematics, Michigan State University, East Lansing, Michigan, USA
A NOTE ON WEAK CONVERGENCE OF SINGULAR INTEGRALS IN METRIC SPACES
A NOTE ON WEAK CONVERGENCE OF SINGULAR INTEGRALS IN METRIC SPACES VASILIS CHOUSIONIS AND MARIUSZ URBAŃSKI Abstract. We prove that in any metric space (X, d) the singular integral operators Tµ,ε(f)(x) k
More informationSINGULAR INTEGRALS ON SIERPINSKI GASKETS
SINGULAR INTEGRALS ON SIERPINSKI GASKETS VASILIS CHOUSIONIS Abstract. We construct a class of singular integral operators associated with homogeneous Calderón-Zygmund standard kernels on d-dimensional,
More informationX. Tolsa: Analytic capacity, the Cauchy transform, and nonhomogeneous 396 pp
X. Tolsa: Analytic capacity, the Cauchy transform, and nonhomogeneous Calderón-Zygmund theory. Birkhäuser, 2014, 396 pp Heiko von der Mosel, Aachen heiko@instmath.rwth-aachen.de What is analytic capacity?
More informationRaanan Schul Yale University. A Characterization of Subsets of Rectifiable Curves in Hilbert Space p.1/53
A Characterization of Subsets of Rectifiable Curves in Hilbert Space Raanan Schul Yale University A Characterization of Subsets of Rectifiable Curves in Hilbert Space p.1/53 Motivation Want to discuss
More informationAnalytic capacity, rectifiability, and the Cauchy integral
Analytic capacity, rectifiability, and the Cauchy integral Xavier Tolsa Abstract. A compact set E C is said to be removable for bounded analytic functions if for any open set Ω containing E, every bounded
More informationPROCEEDINGS OF THE INTERNET ANALYSIS SEMINAR ON HAUSDORFF GEOMETRY AND SINGULAR INTEGRAL OPERATORS
PROCEEDINGS OF THE INTERNET ANALYSIS SEMINAR ON HAUSDORFF GEOMETRY AND SINGULAR INTEGRAL OPERATORS 1 2 Contents Overview of the Workshop 3 1. Rectifiable sets and the traveling salesman problem 6 Presented
More informationUNIFORM RECTIFIABILITY AND HARMONIC MEASURE III: RIESZ TRANSFORM BOUNDS IMPLY UNIFORM RECTIFIABILITY OF BOUNDARIES OF 1-SIDED NTA DOMAINS.
UNIFORM RECTIFIABILITY AND HARMONIC MEASURE III: RIESZ TRANSFORM BOUNDS IMPLY UNIFORM RECTIFIABILITY OF BOUNDARIES O-SIDED NTA DOMAINS STEVE HOFMANN, JOSÉ MARÍA MARTELL, AND SVITLANA MAYBORODA Abstract.
More informationTWO SUFFICIENT CONDITIONS FOR RECTIFIABLE MEASURES
TWO SUFFICIENT CONDITIONS FOR RECTIFIABLE MEASURES MATTHEW BADGER AND RAANAN SCHUL Abstract. We identify two sufficient conditions for locally finite Borel measures on R n to give full mass to a countable
More informationTOPICS. P. Lax, Functional Analysis, Wiley-Interscience, New York, Basic Function Theory in multiply connected domains.
TOPICS Besicovich covering lemma. E. M. Stein and G. Weiss, Introduction to Fourier analysis on Euclidean spaces. Princeton University Press, Princeton, N.J., 1971. Theorems of Carethedory Toeplitz, Bochner,...
More informationTWO SUFFICIENT CONDITIONS FOR RECTIFIABLE MEASURES
TWO SUFFICIENT CONDITIONS FOR RECTIFIABLE MEASURES MATTHEW BADGER AND RAANAN SCHUL Abstract. We identify two sufficient conditions for locally finite Borel measures on R n to give full mass to a countable
More information1. Introduction BOUNDEDNESS OF THE CAUCHY TRANSFORM IMPLIES L 2 BOUNDEDNESS OF ALL CALDERÓN-ZYGMUND OPERATORS ASSOCIATED TO ODD KERNELS L 2
Publ. Mat. 48 (2004), 445 479 BOUNDEDNESS OF THE CAUCHY TRANSFORM IMPLIES L 2 BOUNDEDNESS OF ALL CALDERÓN-ZYGMUND OPERATORS ASSOCIATED TO ODD KERNELS L 2 Xavier Tolsa Abstract Let µ be a Radon measure
More informationA NOTE ON WAVELET EXPANSIONS FOR DYADIC BMO FUNCTIONS IN SPACES OF HOMOGENEOUS TYPE
EVISTA DE LA UNIÓN MATEMÁTICA AGENTINA Vol. 59, No., 208, Pages 57 72 Published online: July 3, 207 A NOTE ON WAVELET EXPANSIONS FO DYADIC BMO FUNCTIONS IN SPACES OF HOMOGENEOUS TYPE AQUEL CESCIMBENI AND
More information引用北海学園大学学園論集 (171): 11-24
タイトル 著者 On Some Singular Integral Operato One to One Mappings on the Weight Hilbert Spaces YAMAMOTO, Takanori 引用北海学園大学学園論集 (171): 11-24 発行日 2017-03-25 On Some Singular Integral Operators Which are One
More informationUNIFORM MEASURES AND UNIFORM RECTIFIABILITY
UNIFORM MEASURES AND UNIFORM RECTIFIABILITY XAVIER TOLSA Abstract. In this paper it is shown that if µ is an n-dimensional Ahlfors-David regular measure in R d which satisfies the so-called weak constant
More informationTHE PLANAR CANTOR SETS OF ZERO ANALYTIC CAPACITY
JOURNAL OF THE AERICAN ATHEATICAL SOCIETY Volume 6, Number, Pages 9 28 S 0894-0347(02)0040-0 Article electronically published on July 0, 2002 THE PLANAR CANTOR SETS OF ZERO ANALYTIC CAPACITY AND THE LOCAL
More information#A28 INTEGERS 13 (2013) ADDITIVE ENERGY AND THE FALCONER DISTANCE PROBLEM IN FINITE FIELDS
#A28 INTEGERS 13 (2013) ADDITIVE ENERGY AND THE FALCONER DISTANCE PROBLEM IN FINITE FIELDS Doowon Koh Department of Mathematics, Chungbuk National University, Cheongju city, Chungbuk-Do, Korea koh131@chungbuk.ac.kr
More informationarxiv: v1 [math.fa] 1 Sep 2018
arxiv:809.0055v [math.fa] Sep 208 THE BOUNDEDNESS OF CAUCHY INTEGRAL OPERATOR ON A DOMAIN HAVING CLOSED ANALYTIC BOUNDARY Zonguldak Bülent Ecevit University, Department of Mathematics, Art and Science
More informationx i y i f(y) dy, x y m+1
MATRIX WEIGHTS, LITTLEWOOD PALEY INEQUALITIES AND THE RIESZ TRANSFORMS NICHOLAS BOROS AND NIKOLAOS PATTAKOS Abstract. In the following, we will discuss weighted estimates for the squares of the Riesz transforms
More informationCurriculum vitae. Alexander Reznikov September 21, 2016
Curriculum vitae Alexander Reznikov September 21, 2016 Contact information Name : Alexander Reznikov Address: 1527 Stevenson Center, Department of Mathematics, Vanderbilt University, Nashville, TN, 37240
More informationMULTISCALE ANALYSIS OF 1-RECTIFIABLE MEASURES: NECESSARY CONDITIONS
MULTISCAL ANALYSIS OF 1-RCTIFIABL MASURS: NCSSARY CONDITIONS MATTHW BADGR AND RAANAN SCHUL Abstract. We repurpose tools from the theory of quantitative rectifiability to study the qualitative rectifiability
More informationRaanan Schul UCLA Mathematics of Knowledge and Search Engines: Tutorials Sep. 19, Curvature and spanning trees in metric spaces p.
Curvature and spanning trees in metric spaces Raanan Schul UCLA Mathematics of Knowledge and Search Engines: Tutorials Sep. 19, 2007 Curvature and spanning trees in metric spaces p.1/33 How I was brought
More informationBOUNDEDNESS OF THE CAUCHY INTEGRAL AND MENGER CURVATURE
L 2 BOUNDEDNESS OF THE CAUCHY NTEGRAL AND MENGER CURVATURE JOAN VERDERA Abstract. n this paper we explain the relevance of Menger curvature in understanding the L 2 boundedness properties of the Cauchy
More informationDavid E. Barrett and Jeffrey Diller University of Michigan Indiana University
A NEW CONSTRUCTION OF RIEMANN SURFACES WITH CORONA David E. Barrett and Jeffrey Diller University of Michigan Indiana University 1. Introduction An open Riemann surface X is said to satisfy the corona
More information1. Introduction The analytic capacity of a compact set E C is defined as
PAINLEVÉ S PROBLEM AND THE SEMIADDITIVITY OF ANALYTIC CAPACITY XAVIER TOLSA Abstract. Let γ(e) be the analytic capacity of a compact set E and let γ +(E) be the capacity of E originated by Cauchy transforms
More informationCOMMENTARY ON TWO PAPERS OF A. P. CALDERÓN
COMMENTARY ON TWO PAPERS OF A. P. CALDERÓN MICHAEL CHRIST Is she worth keeping? Why, she is a pearl Whose price hath launched above a thousand ships. (William Shakespeare, Troilus and Cressida) Let u be
More informationWELL-POSEDNESS OF A RIEMANN HILBERT
Annales Academiæ Scientiarum Fennicæ Mathematica Volumen 42, 207, 4 47 WELL-POSEDNESS OF A RIEMANN HILBERT PROBLEM ON d-regular QUASIDISKS Eric Schippers and Wolfgang Staubach University of Manitoba, Department
More informationFractional integral operators on generalized Morrey spaces of non-homogeneous type 1. I. Sihwaningrum and H. Gunawan
Fractional integral operators on generalized Morrey spaces of non-homogeneous type I. Sihwaningrum and H. Gunawan Abstract We prove here the boundedness of the fractional integral operator I α on generalized
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 informationStructure theorems for Radon measures
Structure theorems for Radon measures Matthew Badger Department of Mathematics University of Connecticut Analysis on Metric Spaces University of Pittsburgh March 10 11, 2017 Research Partially Supported
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 informationThe Hilbert Transform and Fine Continuity
Irish Math. Soc. Bulletin 58 (2006), 8 9 8 The Hilbert Transform and Fine Continuity J. B. TWOMEY Abstract. It is shown that the Hilbert transform of a function having bounded variation in a finite interval
More informationarxiv:math/ v3 [math.ca] 9 Oct 2007
BCR ALGORITHM AND THE T(b) THEOREM P. AUSCHER AND.X.YANG arxiv:math/0702282v3 [math.ca] 9 Oct 2007 Abstract. We show using the Beylkin-Coifman-Rokhlin algorithm in the Haar basis that any singular integral
More informationINTRINSIC LIPSCHITZ GRAPHS AND VERTICAL β-numbers IN THE HEISENBERG GROUP
INTRINSIC LIPSCHITZ GRAPHS AND VERTICAL β-numbers IN THE HEISENBERG GROUP VASILEIOS CHOUSIONIS, KATRIN FÄSSLER AND TUOMAS ORPONEN ABSTRACT. The purpose of this paper is to introduce and study some basic
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 informationAn example of a convex body without symmetric projections.
An example of a convex body without symmetric projections. E. D. Gluskin A. E. Litvak N. Tomczak-Jaegermann Abstract Many crucial results of the asymptotic theory of symmetric convex bodies were extended
More informationA WEAK-(p, q) INEQUALITY FOR FRACTIONAL INTEGRAL OPERATOR ON MORREY SPACES OVER METRIC MEASURE SPACES
JMP : Volume 8 Nomor, Juni 206, hal -7 A WEAK-p, q) INEQUALITY FOR FRACTIONAL INTEGRAL OPERATOR ON MORREY SPACES OVER METRIC MEASURE SPACES Idha Sihwaningrum Department of Mathematics, Faculty of Mathematics
More informationNonlinear Energy Forms and Lipschitz Spaces on the Koch Curve
Journal of Convex Analysis Volume 9 (2002), No. 1, 245 257 Nonlinear Energy Forms and Lipschitz Spaces on the Koch Curve Raffaela Capitanelli Dipartimento di Metodi e Modelli Matematici per le Scienze
More informationSQUARE FUNCTION ESTIMATES AND THE T'b) THEOREM STEPHEN SEMMES. (Communicated by J. Marshall Ash)
proceedings of the american mathematical society Volume 110, Number 3, November 1990 SQUARE FUNCTION ESTIMATES AND THE T'b) THEOREM STEPHEN SEMMES (Communicated by J. Marshall Ash) Abstract. A very simple
More informationThe Knaster problem and the geometry of high-dimensional cubes
The Knaster problem and the geometry of high-dimensional cubes B. S. Kashin (Moscow) S. J. Szarek (Paris & Cleveland) Abstract We study questions of the following type: Given positive semi-definite matrix
More informationarxiv: v3 [math.ca] 6 Oct 2009
SHARP A 2 INEQUALITY FOR HAAR SHIFT OPERATORS arxiv:09061941v3 [mathca] 6 Oct 2009 MICHAEL T LACEY, STEFANIE PETERMICHL, AND MARIA CARMEN REGUERA Abstract As a Corollary to the main result of the paper
More informationOSCILLATORY SINGULAR INTEGRALS ON L p AND HARDY SPACES
POCEEDINGS OF THE AMEICAN MATHEMATICAL SOCIETY Volume 24, Number 9, September 996 OSCILLATOY SINGULA INTEGALS ON L p AND HADY SPACES YIBIAO PAN (Communicated by J. Marshall Ash) Abstract. We consider boundedness
More informationReview: Stability of Bases and Frames of Reproducing Kernels in Model Spaces
Claremont Colleges Scholarship @ Claremont Pomona Faculty Publications and Research Pomona Faculty Scholarship 1-1-2006 Review: Stability of Bases and Frames of Reproducing Kernels in Model Spaces Stephan
More informationCarleson Measures for Besov-Sobolev Spaces and Non-Homogeneous Harmonic Analysis
Carleson Measures for Besov-Sobolev Spaces and Non-Homogeneous Harmonic Analysis Brett D. Wick Georgia Institute of Technology School of Mathematics & Humboldt Fellow Institut für Mathematik Universität
More informationOpen Problems about Curves, Sets, and Measures
Open Problems about Curves, Sets, and Measures Matthew Badger University of Connecticut Department of Mathematics 8th Ohio River Analysis Meeting University of Kentucky in Lexington March 24 25, 2018 Research
More informationSome Open Problems Concerning Orthogonal Polynomials on Fractals and Related Questions
Special issue dedicated to Annie Cuyt on the occasion of her 60th birthday, Volume 10 2017 Pages 13 17 Some Open Problems Concerning Orthogonal Polynomials on Fractals and Related Questions Gökalp Alpan
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 informationIn this note we give a rather simple proof of the A 2 conjecture recently settled by T. Hytönen [7]. Theorem 1.1. For any w A 2,
A SIMPLE PROOF OF THE A 2 CONJECTURE ANDREI K. LERNER Abstract. We give a simple proof of the A 2 conecture proved recently by T. Hytönen. Our proof avoids completely the notion of the Haar shift operator,
More informationON A MAXIMAL OPERATOR IN REARRANGEMENT INVARIANT BANACH FUNCTION SPACES ON METRIC SPACES
Vasile Alecsandri University of Bacău Faculty of Sciences Scientific Studies and Research Series Mathematics and Informatics Vol. 27207), No., 49-60 ON A MAXIMAL OPRATOR IN RARRANGMNT INVARIANT BANACH
More informationBILIPSCHITZ MAPS, ANALYTIC CAPACITY, AND THE CAUCHY INTEGRAL
BILIPSCHITZ MAPS, ANALYTIC CAPACITY, AND THE CAUCHY INTEGRAL XAVIER TOLSA Abstract. Let ϕ : C C be a bilipschitz map. We prove that if E C is compact, and γ(e, α(e stand for its analytic and continuous
More informationA characterization of the two weight norm inequality for the Hilbert transform
A characterization of the two weight norm inequality for the Hilbert transform Ignacio Uriarte-Tuero (joint works with Michael T. Lacey, Eric T. Sawyer, and Chun-Yen Shen) September 10, 2011 A p condition
More informationUNIFORMLY DISTRIBUTED MEASURES IN EUCLIDEAN SPACES
MATH. SCAND. 90 (2002), 152 160 UNIFORMLY DISTRIBUTED MEASURES IN EUCLIDEAN SPACES BERND KIRCHHEIM and DAVID PREISS For every complete metric space X there is, up to a constant multiple, at most one Borel
More informationWeighted norm inequalities for singular integral operators
Weighted norm inequalities for singular integral operators C. Pérez Journal of the London mathematical society 49 (994), 296 308. Departmento de Matemáticas Universidad Autónoma de Madrid 28049 Madrid,
More informationWeighted composition operators on weighted Bergman spaces of bounded symmetric domains
Proc. Indian Acad. Sci. (Math. Sci.) Vol. 117, No. 2, May 2007, pp. 185 196. Printed in India Weighted composition operators on weighted Bergman spaces of bounded symmetric domains SANJAY KUMAR and KANWAR
More informationUNIFORM RECTIFIABILITY AND HARMONIC MEASURE II: POISSON KERNELS IN L p IMPLY UNIFORM RECTIFIABILITY. Contents
Duke Math. J. 163 2014), no. 8, 1601-1654. UNIFORM RECTIFIABILITY AND HARMONIC MEASURE II: POISSON KERNELS IN L p IMPLY UNIFORM RECTIFIABILITY STEVE HOFMANN, JOSÉ MARÍA MARTELL, AND IGNACIO URIARTE-TUERO
More informationA Picard type theorem for holomorphic curves
A Picard type theorem for holomorphic curves A. Eremenko Let P m be complex projective space of dimension m, π : C m+1 \{0} P m the standard projection and M P m a closed subset (with respect to the usual
More informationFreiman s theorem, Fourier transform and additive structure of measures
Freiman s theorem, Fourier transform and additive structure of measures A. Iosevich and M. Rudnev September 4, 2005 Abstract We use the Green-Ruzsa generalization of the Freiman theorem to show that if
More informationABSOLUTE CONTINUITY OF FOLIATIONS
ABSOLUTE CONTINUITY OF FOLIATIONS C. PUGH, M. VIANA, A. WILKINSON 1. Introduction In what follows, U is an open neighborhood in a compact Riemannian manifold M, and F is a local foliation of U. By this
More informationRigidity of harmonic measure
F U N D A M E N T A MATHEMATICAE 150 (1996) Rigidity of harmonic measure by I. P o p o v i c i and A. V o l b e r g (East Lansing, Mich.) Abstract. Let J be the Julia set of a conformal dynamics f. Provided
More information1. INTRODUCTION One of the standard topics in classical harmonic analysis is the study of singular integral operators (SIOs) of the form
NONNEGATIVE KERNELS AND 1-RECTIFIABILITY IN THE HEISENBERG GROUP VASILEIOS CHOUSIONIS AND SEAN LI ABSTRACT. Let E be an 1-regular subset of the Heisenberg group H. We prove that there exists a 1-homogeneous
More informationESTIMATES FOR MAXIMAL SINGULAR INTEGRALS
ESTIMATES FOR MAXIMAL SINGULAR INTEGRALS LOUKAS GRAFAKOS Abstract. It is shown that maximal truncations of nonconvolution L -bounded singular integral operators with kernels satisfying Hörmander s condition
More informationOn the Length of Lemniscates
On the Length of Lemniscates Alexandre Eremenko & Walter Hayman For a monic polynomial p of degree d, we write E(p) := {z : p(z) =1}. A conjecture of Erdős, Herzog and Piranian [4], repeated by Erdős in
More informationBloch radius, normal families and quasiregular mappings
Bloch radius, normal families and quasiregular mappings Alexandre Eremenko Abstract Bloch s Theorem is extended to K-quasiregular maps R n S n, where S n is the standard n-dimensional sphere. An example
More informationarxiv: v1 [math.fa] 13 Jul 2007
Proc. Indian Acad. Sci. (Math. Sci.) Vol. 117, No. 2, May 2003, pp. 185 195. Printed in India Weighted composition operators on weighted Bergman spaces of bounded symmetric domains arxiv:0707.1964v1 [math.fa]
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 informationarxiv: v1 [math.ca] 25 Jul 2017
SETS WITH ARBITRARILY SLOW FAVARD LENGTH DECAY BOBBY WILSON arxiv:1707.08137v1 [math.ca] 25 Jul 2017 Abstract. In this article, we consider the concept of the decay of the Favard length of ε-neighborhoods
More informationCURRICULUM VITAE. Degrees: Degree Major University Year Ph.D., M.S. Mathematics California Institute of Technology June 1995
CURRICULUM VITAE Name: Alexei Poltoratski Office Address: Department of Mathematics Texas A&M University College Station, TX 77843-3368 Room 623B, Blocker Building (979) 845-6028 (Fax) alexeip@math.tamu.edu
More informationALBERT MAS AND XAVIER TOLSA
L p -ESTIMATES FOR THE VARIATION FOR SINGULAR INTEGRALS ON UNIFORMLY RECTIFIABLE SETS ALBERT MAS AND XAVIER TOLSA Abstract. The L p 1 < p < ) and weak-l 1 estimates for the variation for Calderón- Zygmund
More informationHOMOGENEOUS KERNERLS AND SELF SIMILAR SETS. 1. Introduction The singular integrals, with respect to the Lebesgue measure in R d, T (f)(x) =
HOMOGENEOUS KERNERLS AND SELF SIMILAR SETS VASILEIOS CHOUSIONIS AND MARIUSZ URBAŃSKI Abstract. We consider singular integrals associated to homogeneous kernels on self similar sets. Using ideas from Ergodic
More informationM ath. Res. Lett. 16 (2009), no. 1, c International Press 2009
M ath. Res. Lett. 16 (2009), no. 1, 149 156 c International Press 2009 A 1 BOUNDS FOR CALDERÓN-ZYGMUND OPERATORS RELATED TO A PROBLEM OF MUCKENHOUPT AND WHEEDEN Andrei K. Lerner, Sheldy Ombrosi, and Carlos
More informationON LIPSCHITZ-LORENTZ SPACES AND THEIR ZYGMUND CLASSES
Hacettepe Journal of Mathematics and Statistics Volume 39(2) (2010), 159 169 ON LIPSCHITZ-LORENTZ SPACES AND THEIR ZYGMUND CLASSES İlker Eryılmaz and Cenap Duyar Received 24:10 :2008 : Accepted 04 :01
More informationRECTIFIABILITY OF HARMONIC MEASURE
RECTIFIABILITY OF HARMONIC MEASURE JONAS AZZAM, STEVE HOFMANN, JOSÉ MARÍA MARTELL, SVITLANA MAYBORODA, MIHALIS MOURGOGLOU, XAVIER TOLSA, AND ALEXANDER VOLBERG ABSTRACT. In the present paper we prove that
More informationSOME PROPERTIES ON THE CLOSED SUBSETS IN BANACH SPACES
ARCHIVUM MATHEMATICUM (BRNO) Tomus 42 (2006), 167 174 SOME PROPERTIES ON THE CLOSED SUBSETS IN BANACH SPACES ABDELHAKIM MAADEN AND ABDELKADER STOUTI Abstract. It is shown that under natural assumptions,
More informationUNIFORM EMBEDDINGS OF BOUNDED GEOMETRY SPACES INTO REFLEXIVE BANACH SPACE
UNIFORM EMBEDDINGS OF BOUNDED GEOMETRY SPACES INTO REFLEXIVE BANACH SPACE NATHANIAL BROWN AND ERIK GUENTNER ABSTRACT. We show that every metric space with bounded geometry uniformly embeds into a direct
More informationPCA sets and convexity
F U N D A M E N T A MATHEMATICAE 163 (2000) PCA sets and convexity by Robert K a u f m a n (Urbana, IL) Abstract. Three sets occurring in functional analysis are shown to be of class PCA (also called Σ
More informationOn isomorphisms of Hardy spaces for certain Schrödinger operators
On isomorphisms of for certain Schrödinger operators joint works with Jacek Zienkiewicz Instytut Matematyczny, Uniwersytet Wrocławski, Poland Conference in Honor of Aline Bonami, Orleans, 10-13.06.2014.
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 informationJordan Journal of Mathematics and Statistics (JJMS) 9(1), 2016, pp BOUNDEDNESS OF COMMUTATORS ON HERZ-TYPE HARDY SPACES WITH VARIABLE EXPONENT
Jordan Journal of Mathematics and Statistics (JJMS 9(1, 2016, pp 17-30 BOUNDEDNESS OF COMMUTATORS ON HERZ-TYPE HARDY SPACES WITH VARIABLE EXPONENT WANG HONGBIN Abstract. In this paper, we obtain the boundedness
More informationarxiv: v2 [math.ca] 19 Feb 2014
BOUNDS FOR THE HLBERT TRANSFORM WTH MATRX A WEGHTS KELLY BCKEL, STEFANE PETERMCHL, AND BRETT D. WCK arxiv:140.3886v [math.ca] 19 Feb 014 Abstract. LetW denote a matrixa weight. n this paper we implement
More information370 G. David 1. Introduction. The main goal of this paper is to complete the proof of Vitushkin's conjecture on 1-sets of vanishing analytic capacity.
Revista Matematica Iberoamericana Vol. 14, N. o 2, 1998 Unrectiable 1-sets have vanishing analytic capacity Guy David Resume. On complete la demonstration d'une conjecture de Vitushkin: si E est une partie
More informationarxiv: v1 [math.ca] 29 Dec 2018
A QUANTITATIVE WEIGHTED WEAK-TYPE ESTIMATE FOR CALDERÓN-ZYGMUND OPERATORS CODY B. STOCKDALE arxiv:82.392v [math.ca] 29 Dec 208 Abstract. The purpose of this article is to provide an alternative proof of
More informationBeltrami equations with coefficient in the Sobolev space W 1,p
Beltrami equations with coefficient in the Sobolev space W 1,p A. Clop, D. Faraco, J. Mateu, J. Orobitg, X. Zhong Abstract We study the removable singularities for solutions to the Beltrami equation f
More informationREMOVABLE SINGULARITIES FOR H p SPACES OF ANALYTIC FUNCTIONS, 0 < p < 1
Annales Academiæ Scientiarum Fennicæ Mathematica Volumen 26, 2001, 155 174 REMOVABLE SINGULARITIES FOR H p SPACES OF ANALYTIC FUNCTIONS, 0 < p < 1 Anders Björn Linköping University, Department of Mathematics
More informationVECTOR A 2 WEIGHTS AND A HARDY-LITTLEWOOD MAXIMAL FUNCTION
VECTOR A 2 WEIGHTS AND A HARDY-LITTLEWOOD MAXIMAL FUNCTION MICHAEL CHRIST AND MICHAEL GOLDBERG Abstract. An analogue of the Hardy-Littlewood maximal function is introduced, for functions taking values
More informationPotential Analysis meets Geometric Measure Theory
Potential Analysis meets Geometric Measure Theory T. Toro Abstract A central question in Potential Theory is the extend to which the geometry of a domain influences the boundary regularity of the solution
More informationarxiv: v1 [math.fa] 13 Apr 2010
A COMPACT UNIVERSAL DIFFERENTIABILITY SET WITH HAUSDORFF DIMENSION ONE arxiv:1004.2151v1 [math.fa] 13 Apr 2010 MICHAEL DORÉ AND OLGA MALEVA Abstract. We give a short proof that any non-zero Euclidean space
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 informationA. Iosevich and I. Laba January 9, Introduction
K-DISTANCE SETS, FALCONER CONJECTURE, AND DISCRETE ANALOGS A. Iosevich and I. Laba January 9, 004 Abstract. In this paper we prove a series of results on the size of distance sets corresponding to sets
More informationAstala s conjecture on distortion of Hausdorff measures under quasiconformal maps in the plane
Acta Math., 204 (2010), 273 292 DOI: 10.1007/s11511-010-0048-5 c 2010 by Institut Mittag-Leffler. All rights reserved Astala s conjecture on distortion of Hausdorff measures under quasiconformal maps in
More informationL 2 -BOUNDEDNESS OF THE CAUCHY INTEGRAL OPERATOR FOR CONTINUOUS MEASURES
Vol. 98, No. 2 DUKE MATHEMATICAL JOURNAL 999 L 2 -BOUNDEDNESS OF THE CAUCHY INTEGRAL OPERATOR FOR CONTINUOUS MEASURES XAVIER TOLSA. Introduction. Let µ be a continuous i.e., without atoms positive Radon
More informationarxiv:math/ v1 [math.fa] 1 Jul 1994
RESEARCH ANNOUNCEMENT APPEARED IN BULLETIN OF THE AMERICAN MATHEMATICAL SOCIETY Volume 31, Number 1, July 1994, Pages 39-43 arxiv:math/9407215v1 [math.fa] 1 Jul 1994 CLOSED IDEALS OF THE ALGEBRA OF ABSOLUTELY
More informationNECESSARY CONDITIONS FOR WEIGHTED POINTWISE HARDY INEQUALITIES
NECESSARY CONDITIONS FOR WEIGHTED POINTWISE HARDY INEQUALITIES JUHA LEHRBÄCK Abstract. We establish necessary conditions for domains Ω R n which admit the pointwise (p, β)-hardy inequality u(x) Cd Ω(x)
More informationPARTIAL REGULARITY OF BRENIER SOLUTIONS OF THE MONGE-AMPÈRE EQUATION
PARTIAL REGULARITY OF BRENIER SOLUTIONS OF THE MONGE-AMPÈRE EQUATION ALESSIO FIGALLI AND YOUNG-HEON KIM Abstract. Given Ω, Λ R n two bounded open sets, and f and g two probability densities concentrated
More informationDAVID MAPS AND HAUSDORFF DIMENSION
Annales Academiæ Scientiarum Fennicæ Mathematica Volumen 9, 004, 38 DAVID MAPS AND HAUSDORFF DIMENSION Saeed Zakeri Stony Brook University, Institute for Mathematical Sciences Stony Brook, NY 794-365,
More informationADJOINTS OF LIPSCHITZ MAPPINGS
STUDIA UNIV. BABEŞ BOLYAI, MATHEMATICA, Volume XLVIII, Number 1, March 2003 ADJOINTS OF LIPSCHITZ MAPPINGS ŞTEFAN COBZAŞ Dedicated to Professor Wolfgang W. Breckner at his 60 th anniversary Abstract. The
More informationTobias Holck Colding: Publications
Tobias Holck Colding: Publications [1] T.H. Colding and W.P. Minicozzi II, The singular set of mean curvature flow with generic singularities, submitted 2014. [2] T.H. Colding and W.P. Minicozzi II, Lojasiewicz
More informationRegularizations of general singular integral operators
Regularizations of general singular integral operators Texas A&M University March 19th, 2011 This talk is based on joint work with Sergei Treil. This work is accepted by Revista Matematica Iberoamericano
More informationON A MEASURE THEORETIC AREA FORMULA
ON A MEASURE THEORETIC AREA FORMULA VALENTINO MAGNANI Abstract. We review some classical differentiation theorems for measures, showing how they can be turned into an integral representation of a Borel
More informationQUOTIENTS OF ESSENTIALLY EUCLIDEAN SPACES
QUOTIENTS OF ESSENTIALLY EUCLIDEAN SPACES T. FIGIEL AND W. B. JOHNSON Abstract. A precise quantitative version of the following qualitative statement is proved: If a finite dimensional normed space contains
More informationPACKING DIMENSIONS, TRANSVERSAL MAPPINGS AND GEODESIC FLOWS
Annales Academiæ Scientiarum Fennicæ Mathematica Volumen 29, 2004, 489 500 PACKING DIMENSIONS, TRANSVERSAL MAPPINGS AND GEODESIC FLOWS Mika Leikas University of Jyväskylä, Department of Mathematics and
More informationFUNCTION BASES FOR TOPOLOGICAL VECTOR SPACES. Yılmaz Yılmaz
Topological Methods in Nonlinear Analysis Journal of the Juliusz Schauder Center Volume 33, 2009, 335 353 FUNCTION BASES FOR TOPOLOGICAL VECTOR SPACES Yılmaz Yılmaz Abstract. Our main interest in this
More information