LOCAL FACTORS FOR METAPLECTIC GROUPS: AN ADDENDUM TO LAPID-RALLIS
|
|
- Tracy Griffin
- 5 years ago
- Views:
Transcription
1 LOCAL FACTORS FOR METAPLECTIC GROUPS: AN ADDENDUM TO LAPID-RALLIS WEE TECK GAN 1. Introduction In 4.3, we have used the doubling zeta integral and a normalized intertwining operator to define the standard γ-factor associated to an irreducible genuine representation σ of Mp(W). We noted there that this γ-factor satisfies a number of expected properties, as in [LR Thm. 4]. The purpose of this appendix is to verify these expected properties Doubling zeta integrals. Let us recall the basic definitions briefly. Throughout, W will denote a symplectic vector space of dimension 2n. We set W W +( W), so that there is a natural map Mp(W) µ2 Mp(W) Mp(W). Consider the diagonally embedded W which is a maximal isotropic subspace of W. The maximal parabolic subgroup of Sp(W) stabilizing W is P(W ) GL( W). Going to covering groups, one has P(W ) GL(W ) Mp(W). Fix a non-trivial additive character ψ of F. Then ψ determines a genuine character χ ψ of GL(W ). For any character χ of F, one can define the degenerate principal series representation I P(W,ψ(s,χ) : IndMp(W) P(W χ ψ (χ det) det s. Now let σ be an irreducible genuine representation of Mp(W) with contragredient σ. One has a natural Mp(W)-invariant pairing, on σ σ. For v σ, v σ and a holomorphic section f s I P(W,ψ(s,χ), the doubling zeta integral is defined by Z W,ψ (s,χ)(f,v,v ) f s (g,1) gv,v dg Mp(W) for a fixed Haar measure dg on Mp(W). Thus, Z W,ψ (s,χ) defines a Mp(W) Mp(W)-invariant linear form Z W,ψ (s,χ) : I P(W,ψ (s,χ) σ σ C. The analytic properties of this zeta integral, as a function of s, are as summarized in Thm
2 2 WEE TECK GAN 1.2. Normalization of intertwining operator. One has an intertwining operator defined by M(χ,s) : I P(W,ψ (s,χ) I P(W,ψ ( s,χ 1 ) M(χ,s)(f)(g) f(wng)dn where w (1, 1) Mp(W) µ2 Mp(W). This integral converges for Re(s) sufficiently large and has a meromorphic continuation to all of C. Note that this intertwining operator depends on the choice of the Haar measure dn on. In [Sw] and [Z], a normalization of M(χ,s) is given as in [LR], and we recall its definition briefly. We fix a nondegenerate character on the abelian group Sym 2 W as follows. To every homomorphism A : Sym 2 W F, or equivalently a symmetric bilinear form on W, one obtains a character ψ A ψ A of. Now note that A Sym 2 W Hom(W,W ). If one identifies W W via (w, w) 2w and W W via (w,w) w (following [LR]), then A : W W, and so one may consider deta. Henceforth, we assume that A corresponds to the split quadratic form on the even dimensional space W, in which case deta ( 1) n F. Now one can show (cf. [Z]) that, for all s, dimhom (I P(W,ψ (s,χ),ψ A) 1. Moreover, a nonzero element of this 1-dimensional space can be given as a generalized Jacquet integral: W ψ,a (χ,s)(f) f(wn) ψ A (n) 1 dn This integral converges for Re(s) sufficiently large and has an analytic continuation to C. Note that W ψ,a (χ,s) depends on the choice of the Haar measure dn. By the multiplicity one result above, there is a meromorphic function c ψ,a (χ,s) such that W ψ,a (χ 1, s) M(χ,s) c ψ,a (χ,s) W ψ,a (χ,s). The explicit determination of the function c ψ,a (χ,s) has been given in [Sw] (see also [Z]). We shall recall the answer in the unramified case below. In general, the following consequence of Sweet s results is sufficient for our purpose: Proposition 1.1. We have c ψ,a (s,χχ a ) χ a ( 1) n c ψ,a (s,χ) for any quadratic character χ a (associated to A F ), and c ψa,a(s,χ) c ψ (s,χ) χ(a) 2n a 2ns χ a ( 1) n, c ψ,a A (s,χ) c ψ,a (s,χ) χ(a) 2n a 2ns.
3 AN ADDENDUM TO LAPID-RALLIS 3 Indeed, we shall give an independent proof of this proposition later on. Now one may normalize the intertwining operator M(χ,s) by setting so that M ψ,a (χ,s) c ψ,a(χ,s) 1 M(χ,s), W ψ,a (χ 1, s) M ψ,a (χ,s) W ψ,a(χ,s). Then this normalized operator is independent of the choice of the Haar measure dn (we are of course using the same dn in the defintion of M(χ,s) and W ψ,a (χ,s)). Moreover, it satisfies The above proposition implies: Mψ,A (χ 1, s) Mψ,A (χ,s) 1. Corollary 1.2. As linear maps from I P(W,ψ (s,χ) to I P(W ),ψ ( s,χ 1 ), one has: M ψ,a A (χ,s) χ(a)2n a 2ns M ψ,a (χ,s) Definition of local factors. Using the normalized intertwining operator, we define the standard γ-factor associated to the representation σ χ of Mp(W) GL 1 by the functional equation Z W,ψ,A ( s,χ 1 ) (M ψ,a (χ,s) 1 σ 1 σ ) z ψ (σ) χ(det A) det(a) s γ(s+ 1 2,σ χ,ψ) Z W,ψ(s,χ). It follows from the previous Corollary 1.2 that γ(s,σ χ,ψ) is independent of the choice of A. We may then define the local L-factor L(s,σ χ,ψ) and the local epsilon factor ǫ(s,σ χ,ψ) by the procedure of 4.3, i,e, following Shahidi. It follows from definition that γ(s,σ χ t,ψ) γ(s + t,σ χ,ψ). The rest of this appendix is devoted to verifying other less obvious properties of γ(s,σ χ,ψ). The first order of business is to understand the unramified case thoroughly Unramified case. Assume that the residue characteristic p of F is odd and all the data involved (i.e. σ, χ, ψ and A) are unramified. Then one has σ I B,ψ (χ 1,...,χ n ) for some unramified characters χ i of F. In this case, one would like to check that n L(s,σ χ,ψ) L (s,σ χ,ψ) : L(s,χ i χ) L(s,χ 1 i χ). However, this is not immediate from the definition. One can show this desired equality by an explicit calculation of the various quantities used in the definition of the γ-factor. The results are summarized in the following proposition. i1
4 4 WEE TECK GAN Proposition 1.3. Suppose that p is odd and σ, χ, ψ and A are unramified. Let f 0, v 0 and v 0 be the spherical vectors in I P(W ),ψ (s,χ), σ and σ respectively. (i) One has: where Z W,ψ (s,χ)(f 0,v 0,v 0 ) L (s,σ χ,ψ) d(χ, s) d(χ,s) n L(2s,+2k,χ 2 ). k1 (ii) One has (iii) One has (iv) One has W ψ,a (χ,s)(f 0 ) 1 d(χ,s). M(χ,s)(f 0 ) c ψ,a (χ,s) n j1 L(2s 2j + 1,χ 2 ) L(2s + 2j,χ 2. ) n γ(2s (2j 1),χ 2,ψ) 1, where the γ-factors on the right are those of Tate. In particular, one has j1 M ψ,a (χ,s)(f 0) d(χ 1, s) d(χ, s) Proof. The statement (i) was when by J. S Li [Li, Prop. 4.6]. (ii) can be shown in the same way as in [LR, Prop. 4]. (iii) was shown by Zorn [Z, 4]. Finally, (iv) was shown by Sweet [Sw] though it also follows from (ii) and (iii). Corollary 1.4. Assume the same hypotheses as the above proposition. Then one has In particular, one has f 0. γ(s,σ χ,ψ) L (1 s,σ χ 1,ψ) L. (s,σ χ,ψ) L(s,σ χ,ψ) L (s,σ χ,ψ). Proof. The first assertion follows from the above proposition and the definition of γ(s,σ χ,ψ), on noting that z ψ (σ) 1. For the second assertion, suppose that σ I B,ψ (χ 1,...,χ n ). If σ is tempered and χ is unitary, then χ i is unitary for each i and hence there can be no cancellation of factors in L (1 s,σ χ 1,ψ) with those of L (s,σ χ,ψ). This implies the desired equality in the tempered case. The non-tempered case follows by definition and the fact that every non-tempered unramified σ is the unique Langlands quotient of an unramified standard module.
5 AN ADDENDUM TO LAPID-RALLIS Doubling zeta integral for GL(X). In order to establish the crucial property of multiplicativity of the γ-factors defined above, it is necessary to consider the doubling zeta integral associated to a representation of a Levi subgroup M of Mp(W). If X W is an isotropic subspace, with W X + W 0 + X and, P(X) M(X) N(X) is the associated maximal parabolic, then M(X) GL(X) µ2 Mp(W 0 ). Thus, we need to consider the doubling zeta integral associated to a genuine irreducible representation of GL(X). The nonlinear group GL(X) and its genuine representations were described in 2.3 and 2.4. Let X be a vector space and set X X X. Let so that X {(x,x) x X} X and X {(x, x) : x X}, X X X. Let P(X ) be the parabolic subgroup of GL(X) stabilizing X. The Levi subgroup of P(X ) is M(X ) GL(X ) GL(X ), and its unipotent radical is N(X ) Hom(X,X ). For ease of notation, we shall simply write det for the rational character det X det 1 M(X ). Then one has the degenerate principal series representation of GL(X), with χψ defined as in 2.4. I P(X ),ψ (χ,s) : Ind P(X ) χ ψ (χ det) det s We may now repeat the construction of the doubling zeta integral. Let τ be an irreducible representation of GL(X), and set τ ψ : χ ψ τ so that τ ψ is a genuine representation of GL(X). Then one sets Z X,ψ (s,χ)( f,v,v ) f s (g,1) τψ (g)v,v dg GL(X) for f s I P(X ),ψ (χ,s), v τ ψ and v τψ. This is the doubling zeta integral for the representation τ ψ χ of GL(X) GL1, and it defines a GL(X) GL(X)- invariant form Z X,ψ s,χ) : I P(X ),ψ (χ,s) τ ψ τ ψ C. X of As before, one has a standard intertwining operator M(χ,s) : I P(X ),ψ (χ,s) I P(X ),ψ (χ 1, s), and one may define an normalized intertwining operator M ψ (χ,s) as above (cf. also [LR]). Namely, one fixes the nondegenerate character B : N(X ) F corresponding to an isomorphism X X. Then ψ B ψ B is a unitary character of N(X ), and one has the
6 6 WEE TECK GAN corresponding generalized Jacquet integral Wψ,B (χ,s) on I P(X ),ψ(χ,s). By a multiplicity one result, one has W ψ,b (χ 1, s) M(χ,s) c ψ,b (χ,s) Wψ,B (χ,s), for some meromorphic function c ψ,b (χ,s). Then the normalized intertwining operator is defined by: M ψ,b (χ,s) c ψ,b(χ,s) 1 M(χ,s). Finally, one defines a standard γ-factor γ(s,τ χ,ψ) by the local functional equation Z X ( s,χ 1, M ψ (χ,s)( f),v,v ) γ(s + 1/2,τ χ,ψ) (τ χ)( 1 X ) χ(det B) detb 2s ZX (s,χ, f,v,v ), where det B is defined in the same way as in the symplectic or metaplectic case. As before, one has the analog of Corollary 1.2 which ensures that the γ-factor here is independent of the scaling of B Relation to linear case. Now one has the linear version of the construction of the previous subsection, as detailed in [LR]. Thus, for the given representation τ of GL(X), one has the zeta integral Z X (s,χ)(f,,v,v ), the normalized intertwining operator Mψ,B (χ,s) and the γ-factor γ X (s,τ χ,ψ) defined by Z X ( s,χ 1 )(M ψ,b (χ,s)f,v,v ) γ X (s + 1/2,τ χ,ψ) (τ χ)( 1 X ) χ(det B) detb 2s Z X (s,χ,f,v,v ). We note here a typo in [LR, equation (25)], where on the right hand side of the above equation, they had τ( 1) instead of (τ χ)( 1). Moreover, it was shown in [LR] that γ X (s,τ χ,ψ) γ GJ (s,τ χ,ψ) γ GJ (s,τ χ,ψ), where γ GJ refers to the γ-factors of Godement-Jacquet. If one examines the proof of this identity in [LR], one sees that it is the definition using (τ χ)( 1) which leads to this desired relation. The goal of this subsection is to relate the nonlinear doubling zeta integral ZX and the γ-factor γ X (s,τ χ,ψ) defined in the previous subsection to its linear versions. We first note that there is a natural GL(X)-equivariant isomorphism ι(χ,s) : I P(X )(χ,s) χ ψ I P(X ),ψ (χ,s) given by f f f χ ψ. The following lemma is easy to check. Lemma 1.5. One has: and W ψ,b (χ,s) ι(χ,s) χ ψ ( 1 X ) W ψ,b (χ,s) M(χ,s) ι(χ,s) χ ψ ( 1 X ) ι(χ 1, s) M(χ,s)
7 AN ADDENDUM TO LAPID-RALLIS 7 Thus, so that Moreover, c ψ,b (χ,s) χ ψ ( 1 X ) c ψ,b (χ,s), M ψ,b (χ,s) ι(χ,s) ι(χ 1, s) M ψ,b (χ,s). Z X (s,χ,,ι(χ,s)(f),v,v ) 2 Z X (s,χ,f,v,v ). The lemma immediately implies: Proposition 1.6. One has γ X (s,τ χ,ψ) γ X (s,τ χ,ψ). In particular, γ X (s,τ χ,ψ) is independent of the choice of the isomorphism B, and not just indpendent of the scaling of B The main theorem. Now we come to the main theorem of this appendix. Theorem 1.7. One has: (i) (Multiplicativity) Suppose that σ Ind Mp(W) P(X),ψ τ σ 0, where P(X) is a maximal parabolic subgroup with Levi factor GL(X) µ2 Mp(W 0 ), τ is an irreducible representation of GL(X) and σ 0 is an irreducible genuine representation of Mp(W 0 ), then γ W (s,σ χ,ψ) γ X (s,τ χ,ψ) γ W0 (s,σ 0 χ,ψ). (ii) (Variation of ψ) If a F and ψ a (x) ψ(ax), then γ W (s,σ χ,ψ a ) χ(a) 2n a 2n(s 1/2) γ W (s,σ χ a χ,ψ). (iii) (Outer automorphism) Let σ a denote the twist of σ by an outer automorphism of Mp(W) given by conjugation by an element in the similitude group GSp(W) of similitude a. Then one has γ W (s,σ a χ,ψ) γ W (s,σ χ a χ,ψ). (iv) (Duality) One has γ W (s,σ χ,ψ) γ W (s,σ χ,ψ 1 ) γ W (s,σ χ 1 χ,ψ). (v) (Functional equation) One has γ W (s,σ χ,ψ) γ W (1 s,σ χ 1,ψ 1 ) 1.
8 8 WEE TECK GAN (vi) (Archimedean case) Suppose that F is archimedean so that (by the analog of the subrepresentation theorem), σ is contained in a principal series representation IB,ψ (χ 1,...,χ n ), then n γ W (s,σ χ,ψ) γ(s,χ i χ,ψ) γ(s,χ 1 i χ,ψ), i1 where the γ-factors on the right are those of Tate. (vii) (Global property) Suppose that k is a number field with ring of adeles A and W is a symplectic space over k. Let σ be a cuspidal representation of Mp(W) A, χ a Hecke character of A and ψ v ψ v a nontrivial additive charcater of k\a. Let S be a finite set of places outside of which all data involved are non-archimedean and unramified, then one has the global functional equation L S (s,σ χ,ψ) v S γ W (s,σ v χ v,ψ v ) L S (1 s,σ χ 1,ψ), where L S (s,σ χ,ψ) v/ S L(s,σ v χ v,ψ v ) (when Re(s) is sufficiently large) is the partial L-function of σ χ with respect to ψ. Moreover, the functions γ W (s,σ,χ,ψ) are characterized by properties (i), (ii) and (vii) Proof of the theorem. The rest of the appendix is devoted to the proof of the theorem Multiplicativity. The proof of multiplicativity is by the same argument as that in [LR]. Namely, one may apply [LR, Prop 2 and Lemma 9] and relate the doubling zeta integral for σ on Mp(W) to the doubling zeta integral for σ 0 on Mp(W 0 ) and the doubling zeta integral for τ ψ χ ψ τ on GL(X). In particular, by [LR, Prop. 2], one has: (1.8) Z W,ψ (s,χ)(f,α,α ) Z W0 X,ψ(s,χ) ( Ψ(χ,s)(f)(g),α(g),α (g) ) dg. P(X) P(X)\Mp(W) Mp(W) Here, we have set Z W0 X,ψ(s,χ) Z W0,ψ(s,χ) Z X,ψ (s,χ), and we have regarded α σ Ind Mp(W) P(X),ψ τ σ 0 as a function on Mp(W) taking values in τ σ 0. Moreover, Ψ(χ,s) is an intertwining operator as defined in [LR]. Ψ(χ,s) : I P(W ),ψ (χ,s) I P(W 0 ),ψ (χ,s) I P(X ),ψ (χ,s)
9 AN ADDENDUM TO LAPID-RALLIS 9 Furthermore, in the normalization of the intertwining operator for Mp(W), let us choose the element A Hom(W,W ) so that A(X ) X, in which case we also have A(W 0 ) W 0. Thus the restriction of A to X determines an element B Hom(X,X ) Hom(N(X ),F). Similarly, the restriction of A to W 0 determines an element A 0 : N(W 0 ) F. By [LR, Lemma 9], one has Hence, we have: Ψ(χ 1, s) M W,ψ,A ( (χ,s) IndMp(W) P(X) M W0 X,ψ,A 0 B (χ,s)) Ψ(χ,s). (1.9) Z W,ψ ( s,χ 1 )(MW,ψ,A (χ,s)(f),α,α ) Z W0 X(s,χ) ( M P(X) P(X)\Mp(W) Mp(W) W 0 X,ψ,A 0 B (χ,s)(ψ(χ,s)(f)(g)),α(g),α (g) ) dg. Now apply the local functional equations of the two zeta integrals in equation (1.9) and compare with equation (1.8). Noting that and one deduces that z ψ (σ) z ψ (σ 0 ) τ( 1), deta deta 0 detb det( B) ( 1) dim X det(a 0 ) (detb) 2. γ W (s,σ χ,ψ) γ W0 (s,σ 0 χ,ψ) γ X (s,τ χ,ψ). The result then follows by Proposition Archimedean case. We note that statement (vi) of the main theorem follows immediately from statement (i), as a consequence of the subrepresentation theorem Variation of ψ. Now we are ready to prove statement (ii) of the main theorem. We note that Thus, I P(W ),ψ a (χ,s) I P(W ),ψ (χχ a,s), Z W,ψa (s,χ) Z W,ψ (s,χχ a ) M ψa (χ,s) M ψ (χχ a,s) z ψa (σ) z ψ (σ) χ a ( 1) n. M ψ a,a (χ,s) c ψ,a(s,χχ a ) c ψa,a(s,χ) M ψ,a (χχ a,s).
10 10 WEE TECK GAN On comparing the local functional equations for Z W,ψa (s,χ) and Z W,ψ (s,χχ a ), one concludes that γ W (s + 1/2,σ χ,ψ a )/γ W (s + 1/2,σ χ a χ,ψ) c ψ,a(s,χχ a ) c ψa,a(s,χ). Thus statement (ii) holds (for any given σ) if and only if: c ψa,a(s,χ) a 2ns χ(a) 2n c ψ,a (s,χχ a ). This is the first and second identities in Proposition 1.1. However, we can prove this identity without resorting to Proposition 1.1 (which was taken as a blackbox from the unpublished work of Sweet [Sw]). Indeed, it follows from the above that if the identity in (ii) holds for one particular σ, then it holds for arbitrary σ! Now, by multiplicativity (i.e. statement (i)), it is easy to see that the identity in (ii) holds for principal series representations induced from the Borel subgroup B of Mp(W). Hence we are done with (ii) Outer automorphism of Mp(W). To address statement (iii) of the main theorem, we need to recall some facts about outer automorphisms of Mp(W). We follow the treatment of Szpruch [Sz]. Consider the element g a of GSp(W) which acts as identity on W and by the scalar a F on W. Then g a has similitude a. Conjugation by g a defines an (outer) automorphism of Sp(W), which preserves the maximal parabolic P(W ). It is a basic fact that this outer automorphsim has a unique lift to Mp(W); we shall denote this lifted automorphism of Mp(W) by ν a. Thus, ν a (h,ǫ) (g a hg 1 a,ǫ a(g) ǫ), for some ǫ a (g) ±1. The following lemma records some facts about the function ǫ a. Lemma (i) If h, then ǫ a (h) 1. (ii) If h M(W ) GL(W ), then ǫ a (h) χ a (det W h). (iii) If h (1, 1) Sp(W) Sp( W) Sp(W), then ǫ a (h) χ a ( 1) n. It follows from the lemma that the automorphism ν a induces a natural map ν a : I P(W ),ψ (χ,s) I P(W ),ψ (χ a χ,s) given by ν a (f)(h) f(ν a (h)) Some computations. Now we can compute the effect of the change of ψ on various objects used in the definition of the γ-factors. Recall that I P(W ),ψ a (χ,s) I P(W ),ψ (χ χ a,s). The following lemma relates the generalized Jacquet integrals W ψa,a(χ,s) and W ψ,a (χ,s). Lemma As linear functionals on I P(W ),ψ a (χ,s), one has W ψa,a(χ,s) χ 1 (a) n χ(a) 2n a 2ns (W ψ,a (χ,s) ν a )
11 Proof. For f I P(W ),ψ a (χ,s), with Re(s) >> 0, one has W ψa,a(χ,s)(f) f(wn) ψ a A (n) 1 dn Now we note that Hence W ψa,a(χ,s)(f) AN ADDENDUM TO LAPID-RALLIS 11 f(wn) ψ A (ν a 1(n)) 1 dn f(wν a (n)) ψ A (n) 1 a n (2n+1) dn f(ν a (ν a 1(w) n)) ψ A (n) 1 a n (2n+1) dn ν a 1(w) (a 1 W,χ a ( 1) n ) GL(W ) Mp(W). f(wn) ψ a A (n) 1 dn χ a ( 1) n a 2ns χ(a) 2n χ ψ (det a 1 W ) f(ν a (w n)) ψ A (n) 1 dn χ 1 (a) n χ(a) 2n a 2ns (W ψ,a (χ,s) ν a ), since χ ψ (det a 1 W ) 1. The following lemma establishes the relation between ν a and the standard intertwining operator M(χ,s). Lemma As operators from I P(W ),ψ (χ,s) to I P(W ),ψ (χ aχ 1, s), one has ν a M ψ (χ,s) χ 1 (a) n χ(a) 2n a 2ns M ψa (χ,s) ν a. Proof. This is given by a similar computation as in the proof of the previous lemma: ν a (M ψ (χ,s)f)(h) M(χ,s)(f)(ν a (h)) f(wn ν a (h))dn f(ν a (ν a 1(wn) h))dn χ 1 (a) n χ(a) 2n a 2ns f(ν a (wnh))dn χ 1 (a) n χ(a) 2n a 2ns M ψa (χ,s) ν a.
12 12 WEE TECK GAN Corollary One has and c ψa,a(χ,s) χ 1 (a) n χ(a) 2n a 2ns c ψ,a (χ,s) ν a M ψ a,a (χ,s) M ψ,a (χ,s) ν a. In particular, we have given an independent proof of the second identity in Proposition 1.1. Together with the results of 1.11, we have thus proven the first two identities of Proposition 1.1, independently of [Sw]. The third identity in Proposition 1.1 can be checked by computations analogous to those in the two lemmas above Outer automorphism. Let us write W X X with X maximal isotropic. Then one has an outer automorphism of Sp(W) given by conjugation by the element which acts as 1 on X and a on X. The lifting of this to Mp(W) is denoted by µ a. Moreover, the outer automorphism µ a µ a on Mp(W) µ2 Mp(W) is the restriction of the outer automorphism of Mp(W) given by the conjugation of the element of GSp(W) which acts as 1 on X X + X and as a on X (X ) + (X ). We denote this outer automorphism of Mp(W) by µ a as well. For any irreducible representation σ of Mp(W), the twisted representation σ a is realized on the same space as σ, but the action of Mp(W) is defined by: σ a (g) σ(µ 1 a (g)). Now consider the local zeta integral for σ a : Z W,ψ (s,χ,σ a )(f,v,v ) f(g,1) (σ a ) (g)v,v dg. Mp(W) Mp(W) Mp(W) Mp(W) f(g,1) σ (µ 1 a (g))(v ),v dg f(µ a (g,1)) σ (g)(v ),v dg f(µ a ν 1 a ν a (g,1))) σ (g)(v ),v dg. Now it is easy to see that µ a νa 1 is the inner automorphism given by the element m a in the Levi subgroup GL(W ) M(W ) of P(W ) which acts as 1 on X and as a on (X ). Thus we have Z W,ψ (s,χ,σ a )(f,v,v ) f(m a ν a (g,1))m 1 a ) σ (g)(v ),v dg Mp(W) δ P(W )(m a ) 1/2 χ ψ (m a ) a ns χ(a) n Z W,ψa (s,χ,σ)(ν a (m 1 a f),v,v ). We have thus shown that
13 AN ADDENDUM TO LAPID-RALLIS 13 Lemma Z W,ψ (s,χ,σ a ) δ P(W )(m a ) 1/2 χ ψ (m a ) a ns χ(a) n Z W,ψa (s,χ,σ) (ν a m 1 a 1 σ 1 σ ). Similarly, one has Z W,ψ ( s,χ 1,σ a ) M ψ,a (s,χ) δ P(W )(m a ) 1/2 χ ψ (m a ) a ns χ(a) n Z W,ψa ( s,χ 1,σ) (ν a m 1 a M ψ,a (s,χ)) δ P(W )(m a ) 1/2 χ ψ (m a ) a ns χ(a) n Z W,ψa ( s,χ 1,σ) (M ψ a,a (s,χ) ν a m 1 a ) where the last equality follows by Corollary By dividing this identity by that in the above lemma, and noting that we deduce that z ψ (σ a ) z ψa (σ), γ W (s,σ a χ,ψ) a 2ns χ(a) 2n γ W (s,σ χ,ψ a ), which gives the identity in (iii) in view of (ii) Duality. Statement (iv) of the main theorem follows from statement (iii), on noting that the contragredient of σ is simply the twist of σ by an outer automorphism associated to an element of GSp(W) of similitude 1 (see [MVW] and [Sun]) Global property. We shall now deal with the global functional equation, and we use the notation in statement (vi). For this, we need to introduce the global zeta integral associated to a cuspidal representation σ v σ v of Mp(W) A. Consider the global degenerate principal series representation I P(W ),ψ (χ,s) of Mp(W) A and its associated Eisenstein series map E ψ (s,χ) : I P(W ),ψ(χ,s) A(Mp(W)), which is a meromorphic function of s. Here A(Mp(W)) is the space of automorphic forms on Mp(W) A. Then the global zeta integral is defined by: Z W,ψ (s,χ) : I P(W ),ψ (χ,s) σ σ C, (Mp(W) k Mp(W) k )\(Mp(W) A Mp(W) A ) Z W,ψ (s,χ)(f,ϕ,ϕ ) E ψ (s,χ)(f)(g 1,g 2 ) ϕ (g 1 ) ϕ(g 2 )dg 1 dg 2. The following proposition summarizes the key properties of this global zeta integral: Proposition (i) For Re(s) >> 0, one has a factorization: Z W,ψ (s,χ) v Z W,ψv (s,χ v ).
14 14 WEE TECK GAN (ii) If S is a sufficiently large finite set of places of k, then one has the equality of meromorphic functions of s: ( ) Z W,ψ (s,χ)(f,ϕ,ϕ ) Z W,ψv (s,χ v )(f v,ϕ v,ϕ v ) LS (s,σ χ,ψ) d S (s,χ) v S where d S (s,χ) is the product of partial Hecke L-functions as defined in Prop (iii) One has the global functional equation: where Z W,ψ ( s,χ 1 ) (M ψ (s,χ) 1 σ 1 σ ) Z W,ψ (s,χ) is the standard global intertwining operator. M ψ (s,χ) : I P(W ),ψ (χ,s) I P(W ),ψ (χ 1, s) Proof. Statement (i) is due to Piatetski-Shapiro and Rallis [GPSR]. Statement (ii) is a direct consequence of Proposition 1.3. Statement (iii) is a consequence of the functional equation of Eisenstein series [MW]. In addition, we need to relate the global intertwining operator M ψ (s,χ) with the normalized local intertwining operators Mψ v (s,χ v ). We fix a rational homomorphism A : k and thus obtain the automorphic character ψ A ψ A of (A). We consider the associated Fourier coefficient map on I P(W ),ψ(χ,s) defined by: W ψ (s,χ)(f) E ψ (s,χ)(f)(n) ψ A (n) 1 dn. (k)\(a) The following proposition summarizes the properties of W ψa (s,χ). Proposition (i) One has: (ii) When Re(s) >> 0, one has W ψ,a (s,χ)(m ψ (s,χ)f) W ψ,a (s,χ)(f). W ψ,a (s,χ)(f) v W ψv (s,χ v )(f v ). Proof. Statement (i) is a consequence of the functional equation of Eisenstein series [MW]. Statement (ii) follows by unfolding the Eisenstein series when Re(s) >> 0. Now for each place v of k, the element A allows one to define the normalized intertwining operator M ψ v,a (s,χ v) c ψv,a(s,χ v ) 1 M ψv (s,χ v ), such that W ψv,a( s,χ 1 v ) M ψ v,a (s,χ v) W ψv,a(s,χ v ).
15 Morally speaking, the above proposition says that AN ADDENDUM TO LAPID-RALLIS 15 v c ψv,a(s,χ v ) 1, so that (M ψ (s,χ) v M ψ v,a (s,χ v). However, the Euler products above do not converge anywhere, and has to be suitably interpreted. This is given by the following proposition, after taking into account the results of Proposition 1.3: Corollary For a sufficiently large finite set S of places of k, one has n L S (2j 2s,,χ 2 ) c ψv,a(s,χ v ) L S (2s 2j + 1,χ 2 ). v S Proof. Consider the identity j1 W ψ,a (s,χ)(m ψ (s,χ)f) W ψ,a (s,χ)(f), with f v f v such that for all v / S, f v fv 0 is the spherical vector. Then Proposition 1.3 implies that ( ) n W ψv,a( s,χ 1 j1 v )(M(s,χ v )(f v )) LS (2s 2j + 1,χ 2 ) d S (s,χ) d S ( s,χ 1 ) v Thus, we have ( ) c ψv,a(s,χ v ) W ψv,a(s,χ v )(f v ) v Hence, ( ) 1 W ψv,a(s,χ v )(f v ) d S (s,χ). v c ψv,a(s,χ v ) v n j1 LS (2s 2j + 1,χ 2 ) d S ( s,χ 1 ) v n j1 L S (2j 2s,,χ 2 ) L S (2s 2j + 1,χ 2 ). W ψv,a(s,χ ) v(f v ). Combining this with the global functional equation in Proposition 1.15(iii), the results of the above corollary and Proposition 1.3, and the local functional equation of the local zeta integral in 1.3, one deduces the desired result as in [LR] Uniqueness. The uniqueness of the γ-factors considered in the main theorem is proved in the same way as [LR].
16 16 WEE TECK GAN References [GPSR] S. Gelbart, I. Piatetski-Shapiro, and S. Rallis, Explicit constructions of automorphic L-functions, volume 1254 of Lecture Notes in Mathematics. Springer-Verlag, Berlin, [Li] J.-S. Li, Nonvanishing theorems for the cohomology of certain arithmetic quotients, J. Reine Angew. Math. 428 (1992), [LR] E. Lapid and S. Rallis, On the local factors of representations of classical groups, in Automorphic representations, L-functions and applications: progress and prospects, , Ohio State Univ. Math. Res. Inst. Publ., 11, de Gruyter, Berlin, [Mu] G. Muić, A geometric construction of intertwining operators for reductive p-adic groups, Manuscripta Math. 125 (2) (2008), [MVW] C. Moeglin, M.-F. Vigneras and J.-L. Waldspurger, Correspondances de Howe sur un corps p-adique, Lecture Notes in Mathematics, Springer-Verlag, Berlin, [MW] C. Moeglin and J. L. Waldspurger, Spectral decomposition and Eisenstein series, Cambridge Tracts in Mathemtics 113, Cambridge University Press (1995). [PSR] I.Piatetski-Shapiro and S. Rallis, ǫ factor of representations of classical groups, Proc. Nat. Acad. Sci. U.S.A. 83 (1986), no. 13, [Sun] B. Y. Sun, Multiplicity one theorems for Fourier-Jacobi models, available at arxiv: v2. [Sw] J. Sweet, Functional equations of p-adic zeta integrals and representations of the metaplectic group, preprint (1995). [Sz] D. Szpruch, The Langlands-Shahidi method for the metaplectic group and applications, thesis (Tel Aviv University), available at arxiv: v1. [Z] C. Zorn, Theta dichotomy and doubling epsilon factors for Mp(n, F), to appear in American J. of Math.
TRILINEAR FORMS AND TRIPLE PRODUCT EPSILON FACTORS WEE TECK GAN
TRILINAR FORMS AND TRIPL PRODUCT PSILON FACTORS W TCK GAN Abstract. We give a short and simple proof of a theorem of Dipendra Prasad on the existence and non-existence of invariant trilinear forms on a
More informationON THE RESIDUAL SPECTRUM OF SPLIT CLASSICAL GROUPS SUPPORTED IN THE SIEGEL MAXIMAL PARABOLIC SUBGROUP
ON THE RESIDUAL SPECTRUM OF SPLIT CLASSICAL GROUPS SUPPORTED IN THE SIEGEL MAXIMAL PARABOLIC SUBGROUP NEVEN GRBAC Abstract. For the split symplectic and special orthogonal groups over a number field, we
More informationON THE RESIDUAL SPECTRUM OF HERMITIAN QUATERNIONIC INNER FORM OF SO 8. Neven Grbac University of Rijeka, Croatia
GLASNIK MATEMATIČKI Vol. 4464)2009), 11 81 ON THE RESIDUAL SPECTRUM OF HERMITIAN QUATERNIONIC INNER FORM OF SO 8 Neven Grbac University of Rijeka, Croatia Abstract. In this paper we decompose the residual
More informationSOME REMARKS ON REPRESENTATIONS OF QUATERNION DIVISION ALGEBRAS
SOME REMARKS ON REPRESENTATIONS OF QUATERNION DIVISION ALGEBRAS DIPENDRA PRASAD Abstract. For the quaternion division algebra D over a non-archimedean local field k, and π an irreducible finite dimensional
More informationIntroduction to L-functions II: of Automorphic L-functions.
Introduction to L-functions II: Automorphic L-functions References: - D. Bump, Automorphic Forms and Representations. - J. Cogdell, Notes on L-functions for GL(n) - S. Gelbart and F. Shahidi, Analytic
More informationOn Cuspidal Spectrum of Classical Groups
On Cuspidal Spectrum of Classical Groups Dihua Jiang University of Minnesota Simons Symposia on Geometric Aspects of the Trace Formula April 10-16, 2016 Square-Integrable Automorphic Forms G a reductive
More informationFourier Coefficients and Automorphic Discrete Spectrum of Classical Groups. Dihua Jiang University of Minnesota
Fourier Coefficients and Automorphic Discrete Spectrum of Classical Groups Dihua Jiang University of Minnesota KIAS, Seoul November 16, 2015 Square-Integrable Automorphic Forms G a reductive algebraic
More informationThe Representations of The Heisenberg Group over a Finite Field
Armenian Journal of Mathematics Volume 3, Number 4, 2010, 162 173 The Representations of The Heisenberg Group over a Finite Field Manouchehr Misaghian Department of Mathematics Prairie view A & M University
More informationBESSEL MODELS FOR GSp(4)
BESSEL MODELS FOR GSp(4) DIPENDRA PRASAD AND RAMIN TAKLOO-BIGHASH To Steve Gelbart Abstract. Methods of theta correspondence are used to analyze local and global Bessel models for GSp 4 proving a conjecture
More informationTHE REGULARIZED SIEGEL-WEIL FORMULA (THE SECOND TERM IDENTITY) AND THE RALLIS INNER PRODUCT FORMULA
THE REGULARIZED SIEGEL-WEIL FORMULA (THE SECOND TERM IDENTITY) AND THE RALLIS INNER PRODUCT FORMULA WEE TECK GAN, YANNAN QIU AND SHUICHIRO TAKEDA In memory of a pioneer Steve Rallis (1942-2012) Abstract.
More informationOn Partial Poincaré Series
Contemporary Mathematics On Partial Poincaré Series J.W. Cogdell and I.I. Piatetski-Shapiro This paper is dedicated to our colleague and friend Steve Gelbart. Abstract. The theory of Poincaré series has
More informationTHE GROSS-PRASAD CONJECTURE AND LOCAL THETA CORRESPONDENCE. 1. Introduction
THE GROSS-RASAD CONJECTURE AND LOCAL THETA CORRESONDENCE WEE TECK GAN AND ATSUSHI ICHINO 1. Introduction In [15], [16], [9], [1], a restriction problem in the representation theory of classical groups
More informationTWO SIMPLE OBSERVATIONS ON REPRESENTATIONS OF METAPLECTIC GROUPS. In memory of Sibe Mardešić
TWO IMPLE OBERVATION ON REPREENTATION OF METAPLECTIC GROUP MARKO TADIĆ arxiv:1709.00634v1 [math.rt] 2 ep 2017 Abstract. M. Hanzer and I. Matić have proved in [8] that the genuine unitary principal series
More informationOn the Self-dual Representations of a p-adic Group
IMRN International Mathematics Research Notices 1999, No. 8 On the Self-dual Representations of a p-adic Group Dipendra Prasad In an earlier paper [P1], we studied self-dual complex representations of
More informationSYMPLECTIC LOCAL ROOT NUMBERS, CENTRAL CRITICAL L-VALUES, AND RESTRICTION PROBLEMS IN THE REPRESENTATION THEORY OF CLASSICAL GROUPS
SYMPLECTIC LOCAL ROOT NUMBERS, CENTRAL CRITICAL L-VALUES, AND RESTRICTION PROBLEMS IN THE REPRESENTATION THEORY OF CLASSICAL GROUPS WEE TECK GAN, BENEDICT H. GROSS AND DIPENDRA PRASAD Contents 1. Introduction
More information260 I.I. PIATETSKI-SHAPIRO and one can associate to f() a Dirichlet series L(f; s) = X T modulo integral equivalence a T jt j s : Hecke's original pro
pacific journal of mathematics Vol. 181, No. 3, 1997 L-FUNCTIONS FOR GSp 4 I.I. Piatetski-Shapiro Dedicated to Olga Taussky-Todd 1. Introduction. To a classical modular cusp form f(z) with Fourier expansion
More informationOn the Non-vanishing of the Central Value of Certain L-functions: Unitary Groups
On the Non-vanishing of the Central Value of Certain L-functions: Unitary Groups arxiv:806.04340v [math.nt] Jun 08 Dihua Jiang Abstract Lei Zhang Let π be an irreducible cuspidal automorphic representation
More informationThe Shimura-Waldspurger Correspondence for Mp(2n)
The Shimura-Waldspurger Correspondence for Wee Teck Gan (Joint with Atsushi Ichino) April 11, 2016 The Problem Let 1 µ 2 Sp(2n) 1 be the metaplectic group (both locally and globally). Consider the genuine
More information1. Statement of the theorem
[Draft] (August 9, 2005) The Siegel-Weil formula in the convergent range Paul Garrett garrett@math.umn.edu http://www.math.umn.edu/ garrett/ We give a very simple, mostly local, argument for the equality
More informationTHE GROSS PRASAD CONJECTURE AND LOCAL THETA CORRESPONDENCE. 1. Introduction
THE GROSS RASAD CONJECTURE AND LOCAL THETA CORRESONDENCE WEE TECK GAN AND ATSUSHI ICHINO Abstract. We establish the Fourier Jacobi case of the local Gross rasad conjecture for unitary groups, by using
More informationCOHOMOLOGY OF ARITHMETIC GROUPS AND EISENSTEIN SERIES: AN INTRODUCTION, II
COHOMOLOGY OF ARITHMETIC GROUPS AND EISENSTEIN SERIES: AN INTRODUCTION, II LECTURES BY JOACHIM SCHWERMER, NOTES BY TONY FENG Contents 1. Review 1 2. Lifting differential forms from the boundary 2 3. Eisenstein
More informationLECTURE 2: LANGLANDS CORRESPONDENCE FOR G. 1. Introduction. If we view the flow of information in the Langlands Correspondence as
LECTURE 2: LANGLANDS CORRESPONDENCE FOR G J.W. COGDELL. Introduction If we view the flow of information in the Langlands Correspondence as Galois Representations automorphic/admissible representations
More informationTWO SIMPLE OBSERVATIONS ON REPRESENTATIONS OF METAPLECTIC GROUPS. Marko Tadić
RAD HAZU. MATEMATIČKE ZNANOTI Vol. 21 = 532 2017: 89-98 DOI: http://doi.org/10.21857/m16wjcp6r9 TWO IMPLE OBERVATION ON REPREENTATION OF METAPLECTIC GROUP Marko Tadić In memory of ibe Mardešić Abstract.
More informationl-modular LOCAL THETA CORRESPONDENCE : DUAL PAIRS OF TYPE II Alberto Mínguez
l-modular LOCAL THETA CORRESPONDENCE : DUAL PAIRS OF TYPE II by Alberto Mínguez Abstract. Let F be a non-archimedean locally compact field, of residual characteristic p, and (G, G a reductive dual pair
More informationCUSPIDALITY OF SYMMETRIC POWERS WITH APPLICATIONS
DUKE MATHEMATICAL JOURNAL Vol. 112, No. 1, c 2002 CUSPIDALITY OF SYMMETRIC POWERS WITH APPLICATIONS HENRY H. KIM and FREYDOON SHAHIDI Abstract The purpose of this paper is to prove that the symmetric fourth
More informationTHETA CORRESPONDENCES FOR GSp(4)
THETA CORRESPONDENCES FOR GSp(4) WEE TECK GAN AND SHUICHIRO TAKEDA Abstract. We explicitly determine the theta correspondences for GSp 4 and orthogonal similitude groups associated to various quadratic
More informationON THE STANDARD MODULES CONJECTURE. V. Heiermann and G. Muić
ON THE STANDARD MODULES CONJECTURE V. Heiermann and G. Muić Abstract. Let G be a quasi-split p-adic group. Under the assumption that the local coefficients C defined with respect to -generic tempered representations
More informationTHE HOWE DUALITY CONJECTURE: QUATERNIONIC CASE
THE HOWE DUALITY CONJECTURE: QUATERNIONIC CASE WEE TECK GAN AND BINYONG SUN In celebration of Professor Roger Howe s 70th birthday Abstract. We complete the proof of the Howe duality conjecture in the
More informationU = 1 b. We fix the identification G a (F ) U sending b to ( 1 b
LECTURE 11: ADMISSIBLE REPRESENTATIONS AND SUPERCUSPIDALS I LECTURE BY CHENG-CHIANG TSAI STANFORD NUMBER THEORY LEARNING SEMINAR JANUARY 10, 2017 NOTES BY DAN DORE AND CHENG-CHIANG TSAI Let L is a global
More informationNon-tempered Arthur Packets of G Introduction
Non-tempered Arthur Packets of G 2 Wee Teck Gan and Nadya Gurevich to Professor S. Rallis with admiration and best wishes 1. Introduction In his famous conjecture, J. Arthur gave a description of the discrete
More informationarxiv: v2 [math.rt] 22 May 2013
A note on the local theta correspondence for unitary similitude dual pairs arxiv:1211.1769v2 [math.rt] 22 May 2013 Chong Zhang April 9, 2018 Abstract ollowing Roberts work in the case of orthogonal-symplectic
More informationReducibility of generic unipotent standard modules
Journal of Lie Theory Volume?? (??)???? c?? Heldermann Verlag 1 Version of March 10, 011 Reducibility of generic unipotent standard modules Dan Barbasch and Dan Ciubotaru Abstract. Using Lusztig s geometric
More informationIMAGE OF FUNCTORIALITY FOR GENERAL SPIN GROUPS
IMAGE OF FUNCTORIALITY FOR GENERAL SPIN GROUPS MAHDI ASGARI AND FREYDOON SHAHIDI Abstract. We give a complete description of the image of the endoscopic functorial transfer of generic automorphic representations
More informationA PROOF OF THE HOWE DUALITY CONJECTURE. 1. Introduction
A PROOF OF THE HOWE DUALITY CONJECTURE WEE TECK GAN AND SHUICHIRO TAKEDA to Professor Roger Howe who started it all on the occasion of his 70th birthday Abstract. We give a proof of the Howe duality conjecture
More informationA Corollary to Bernstein s Theorem and Whittaker Functionals on the Metaplectic Group William D. Banks
A Corollary to Bernstein s Theorem and Whittaker Functionals on the Metaplectic Group William D. Banks In this paper, we extend and apply a remarkable theorem due to Bernstein, which was proved in a letter
More informationSYMPLECTIC LOCAL ROOT NUMBERS, CENTRAL CRITICAL L-VALUES, AND RESTRICTION PROBLEMS IN THE REPRESENTATION THEORY OF CLASSICAL GROUPS I
SYMPLECTIC LOCAL ROOT NUMBERS, CENTRAL CRITICAL L-VALUES, AND RESTRICTION PROBLEMS IN THE REPRESENTATION THEORY OF CLASSICAL GROUPS I WEE TECK GAN, BENEDICT H. GROSS AND DIPENDRA PRASAD Contents 1. Introduction
More informationarxiv: v1 [math.rt] 22 Mar 2015
ON CERTAIN GLOBAL CONSTRUCTIONS OF AUTOMORPHIC FORMS RELATED TO SMALL REPRESENTATIONS OF F 4 DAVID GINZBURG arxiv:1503.06409v1 [math.rt] 22 Mar 2015 To the memory of S. Rallis Abstract. In this paper we
More informationHecke Theory and Jacquet Langlands
Hecke Theory and Jacquet Langlands S. M.-C. 18 October 2016 Today we re going to be associating L-functions to automorphic things and discussing their L-function-y properties, i.e. analytic continuation
More informationOn the Genericity of Cuspidal Automorphic Forms of SO 2n+1
On the Genericity of Cuspidal Automorphic Forms of SO 2n+1 Dihua Jiang School of Mathematics University of Minnesota Minneapolis, MN55455, USA David Soudry School of Mathematical Sciences Tel Aviv University
More informationRepresentations with Iwahori-fixed vectors Paul Garrett garrett/ 1. Generic algebras
(February 19, 2005) Representations with Iwahori-fixed vectors Paul Garrett garrett@math.umn.edu http://www.math.umn.edu/ garrett/ Generic algebras Strict Iwahori-Hecke algebras Representations with Iwahori-fixed
More informationA PRODUCT OF TENSOR PRODUCT L-FUNCTIONS OF QUASI-SPLIT CLASSICAL GROUPS OF HERMITIAN TYPE
A PRODUCT OF TENSOR PRODUCT L-FUNCTIONS OF QUASI-SPLIT CLASSICAL GROUPS OF HERMITIAN TYPE DIHUA JIANG AND LEI ZHANG Abstract. A family of global zeta integrals representing a product of tensor product
More informationarxiv: v1 [math.nt] 1 May 2013
DEGENERATE EISENSTEIN SERIES FOR Sp(4) arxiv:1305.0097v1 [math.nt] 1 May 013 MARCELA HANZER AND GORAN MUIĆ to Steve Rallis, in memoriam Abstract. In this paper we obtain a complete description of images
More informationProof of a simple case of the Siegel-Weil formula. 1. Weil/oscillator representations
(March 6, 2014) Proof of a simple case of the Siegel-Weil formula Paul Garrett garrett@math.umn.edu http://www.math.umn.edu/ garrett/ First, I confess I never understood Siegel s arguments for his mass
More informationCUBIC UNIPOTENT ARTHUR PARAMETERS AND MULTIPLICITIES OF SQUARE INTEGRABLE AUTOMORPHIC FORMS
CUBIC UNIPOTNT ARTHUR PARAMTRS AND MULTIPLICITIS OF SQUAR INTGRABL AUTOMORPHIC FORMS W TCK GAN, NADYA GURVICH AND DIHUA JIANG 1. Introduction Let G be a connected simple linear algebraic group defined
More informationEndoscopic character relations for the metaplectic group
Endoscopic character relations for the metaplectic group Wen-Wei Li wwli@math.ac.cn Morningside Center of Mathematics January 17, 2012 EANTC The local case: recollections F : local field, char(f ) 2. ψ
More informationON A CERTAIN METAPLECTIC EISENSTEIN SERIES AND THE TWISTED SYMMETRIC SQUARE L-FUNCTION
ON A CERTAIN METAPLECTIC EISENSTEIN SERIES AND THE TWISTED SYMMETRIC SQUARE L-FUNCTION SHUICHIRO TAKEDA Abstract. In our earlier paper, based on a paper by Bump and Ginzburg, we used an Eisenstein series
More informationON RESIDUAL COHOMOLOGY CLASSES ATTACHED TO RELATIVE RANK ONE EISENSTEIN SERIES FOR THE SYMPLECTIC GROUP
ON RESIDUAL COHOMOLOGY CLASSES ATTACHED TO RELATIVE RANK ONE EISENSTEIN SERIES FOR THE SYMPLECTIC GROUP NEVEN GRBAC AND JOACHIM SCHWERMER Abstract. The cohomology of an arithmetically defined subgroup
More information14 From modular forms to automorphic representations
14 From modular forms to automorphic representations We fix an even integer k and N > 0 as before. Let f M k (N) be a modular form. We would like to product a function on GL 2 (A Q ) out of it. Recall
More informationOn the Notion of an Automorphic Representation *
On the Notion of an Automorphic Representation * The irreducible representations of a reductive group over a local field can be obtained from the square-integrable representations of Levi factors of parabolic
More informationA correction to Conducteur des Représentations du groupe linéaire
A correction to Conducteur des Représentations du groupe linéaire Hervé Jacquet December 5, 2011 Nadir Matringe has indicated to me that the paper Conducteur des Représentations du groupe linéaire ([JPSS81a],
More informationOn Certain L-functions Titles and Abstracts. Jim Arthur (Toronto) Title: The embedded eigenvalue problem for classical groups
On Certain L-functions Titles and Abstracts Jim Arthur (Toronto) Title: The embedded eigenvalue problem for classical groups Abstract: By eigenvalue, I mean the family of unramified Hecke eigenvalues of
More informationTWISTED SYMMETRIC-SQUARE L-FUNCTIONS AND THE NONEXISTENCE OF SIEGEL ZEROS ON GL(3) William D. Banks
1 TWISTED SYMMETRIC-SQUARE L-FUNCTIONS AND THE NONEXISTENCE OF SIEGEL ZEROS ON GL3) William D. Banks 1. Introduction. In a lecture gien at the Workshop on Automorphic Forms at the MSRI in October 1994,
More informationMarko Tadić. Introduction Let F be a p-adic field. The normalized absolute value on F will be denoted by F. Denote by ν : GL(n, F ) R the character
ON REDUCIBILITY AND UNITARIZABILITY FOR CLASSICAL p-adic GROUPS, SOME GENERAL RESULTS Marko Tadić Abstract. The aim of this paper is to prove two general results on parabolic induction of classical p-adic
More informationFORMAL GROUPS OF CERTAIN Q-CURVES OVER QUADRATIC FIELDS
Sairaiji, F. Osaka J. Math. 39 (00), 3 43 FORMAL GROUPS OF CERTAIN Q-CURVES OVER QUADRATIC FIELDS FUMIO SAIRAIJI (Received March 4, 000) 1. Introduction Let be an elliptic curve over Q. We denote by ˆ
More informationIrreducible subgroups of algebraic groups
Irreducible subgroups of algebraic groups Martin W. Liebeck Department of Mathematics Imperial College London SW7 2BZ England Donna M. Testerman Department of Mathematics University of Lausanne Switzerland
More informationResults from MathSciNet: Mathematical Reviews on the Web c Copyright American Mathematical Society 1998
98m:11125 11R39 11F27 11F67 11F70 22E50 22E55 Gelbart, Stephen (IL-WEIZ); Rogawski, Jonathan (1-UCLA); Soudry, David (IL-TLAV) Endoscopy, theta-liftings, and period integrals for the unitary group in three
More informationHolomorphy of the 9th Symmetric Power L-Functions for Re(s) >1. Henry H. Kim and Freydoon Shahidi
IMRN International Mathematics Research Notices Volume 2006, Article ID 59326, Pages 1 7 Holomorphy of the 9th Symmetric Power L-Functions for Res >1 Henry H. Kim and Freydoon Shahidi We proe the holomorphy
More informationIntroduction to L-functions I: Tate s Thesis
Introduction to L-functions I: Tate s Thesis References: - J. Tate, Fourier analysis in number fields and Hecke s zeta functions, in Algebraic Number Theory, edited by Cassels and Frohlich. - S. Kudla,
More information9 Artin representations
9 Artin representations Let K be a global field. We have enough for G ab K. Now we fix a separable closure Ksep and G K := Gal(K sep /K), which can have many nonabelian simple quotients. An Artin representation
More informationRemarks on the Gan-Ichino multiplicity formula
SIMONS SYMPOSIA 2016 Geometric Aspects of the Trace Formula Sch oss ma A i - Remarks on the Gan-Ichino multiplicity formula Wen-Wei Li Chinese Academy of Sciences The cover picture is taken from the website
More informationTHE SHIMURA CORRESPONDENCE À LA WALDSPURGER
THE SHIMURA CORRESPONDENCE À LA WALDSPURGER WEE TECK GAN 1. Introduction The purpose of this short instructional course is to describe the Shimura correspondence between half integral weight modular forms
More informationRepresentations of Totally Disconnected Groups
Chapter 5 Representations of Totally Disconnected Groups Abstract In this chapter our goal is to develop enough of the representation theory of locally compact totally disconnected groups (or td groups
More informationWeyl Group Representations and Unitarity of Spherical Representations.
Weyl Group Representations and Unitarity of Spherical Representations. Alessandra Pantano, University of California, Irvine Windsor, October 23, 2008 β ν 1 = ν 2 S α S β ν S β ν S α ν S α S β S α S β ν
More informationTHE RESIDUAL EISENSTEIN COHOMOLOGY OF Sp 4 OVER A TOTALLY REAL NUMBER FIELD
THE RESIDUAL EISENSTEIN COHOMOLOGY OF Sp 4 OVER A TOTALLY REAL NUMBER FIELD NEVEN GRBAC AND HARALD GROBNER Abstract. Let G = Sp 4 /k be the k-split symplectic group of k-rank, where k is a totally real
More informationRankin-Selberg L-functions.
Chapter 11 Rankin-Selberg L-functions...I had not recognized in 1966, when I discovered after many months of unsuccessful search a promising definition of automorphic L-function, what a fortunate, although,
More informationA REMARK ON A CONVERSE THEOREM OF COGDELL AND PIATETSKI-SHAPIRO
A REMARK ON A CONVERSE THEOREM OF COGDELL AND PIATETSKI-SHAPIRO HERVÉ JACQUET AND BAIYING LIU Abstract. In this paper, we reprove a global converse theorem of Cogdell and Piatetski-Shapiro using purely
More informationGeometric Structure and the Local Langlands Conjecture
Geometric Structure and the Local Langlands Conjecture Paul Baum Penn State Representations of Reductive Groups University of Utah, Salt Lake City July 9, 2013 Paul Baum (Penn State) Geometric Structure
More informationDiscrete Series Representations of Unipotent p-adic Groups
Journal of Lie Theory Volume 15 (2005) 261 267 c 2005 Heldermann Verlag Discrete Series Representations of Unipotent p-adic Groups Jeffrey D. Adler and Alan Roche Communicated by S. Gindikin Abstract.
More informationA brief overview of modular and automorphic forms
A brief overview of modular and automorphic forms Kimball Martin Original version: Fall 200 Revised version: June 9, 206 These notes were originally written in Fall 200 to provide a very quick overview
More informationHalf the sum of positive roots, the Coxeter element, and a theorem of Kostant
DOI 10.1515/forum-2014-0052 Forum Math. 2014; aop Research Article Dipendra Prasad Half the sum of positive roots, the Coxeter element, and a theorem of Kostant Abstract: Interchanging the character and
More informationOn the equality case of the Ramanujan Conjecture for Hilbert modular forms
On the equality case of the Ramanujan Conjecture for Hilbert modular forms Liubomir Chiriac Abstract The generalized Ramanujan Conjecture for unitary cuspidal automorphic representations π on GL 2 posits
More informationThe following theorem is proven in [, p. 39] for a quadratic extension E=F of global elds, such that each archimedean place of F splits in E. e prove
On poles of twisted tensor L-functions Yuval. Flicker and Dmitrii inoviev bstract It is shown that the only possible pole of the twisted tensor L-functions in Re(s) is located at s = for all quadratic
More informationColette Mœglin and Marko Tadić
CONSTRUCTION OF DISCRETE SERIES FOR CLASSICAL p-adic GROUPS Colette Mœglin and Marko Tadić Introduction The goal of this paper is to complete (after [M2] the classification of irreducible square integrable
More informationOn the cuspidality criterion for the Asai transfer to GL(4)
On the cuspidality criterion for the Asai transfer to GL(4) Dipendra Prasad and Dinakar Ramakrishnan Introduction Let F be a number field and K a quadratic algebra over F, i.e., either F F or a quadratic
More informationCENTRAL CHARACTERS FOR SMOOTH IRREDUCIBLE MODULAR REPRESENTATIONS OF GL 2 (Q p ) Laurent Berger
CENTRAL CHARACTERS FOR SMOOTH IRREDUCIBLE MODULAR REPRESENTATIONS OF GL 2 (Q p by Laurent Berger To Francesco Baldassarri, on the occasion of his 60th birthday Abstract. We prove that every smooth irreducible
More informationLocal root numbers of elliptic curves over dyadic fields
Local root numbers of elliptic curves over dyadic fields Naoki Imai Abstract We consider an elliptic curve over a dyadic field with additive, potentially good reduction. We study the finite Galois extension
More informationTHE LOCAL LANGLANDS CONJECTURE FOR Sp(4)
THE LOCAL LANGLANDS CONJECTURE FOR Sp(4) WEE TECK GAN AND SHUICHIRO TAKEDA Abstract. We show that the local Langlands conjecture for Sp 2n (F ) follows from that for GSp 2n (F ), where F is a non-archimedean
More informationarxiv: v2 [math.nt] 12 Dec 2018
LANGLANDS LAMBDA UNCTION OR QUADRATIC TAMELY RAMIIED EXTENSIONS SAZZAD ALI BISWAS Abstract. Let K/ be a quadratic tamely ramified extension of a non-archimedean local field of characteristic zero. In this
More informationON THE MODIFIED MOD p LOCAL LANGLANDS CORRESPONDENCE FOR GL 2 (Q l )
ON THE MODIFIED MOD p LOCAL LANGLANDS CORRESPONDENCE FOR GL 2 (Q l ) DAVID HELM We give an explicit description of the modified mod p local Langlands correspondence for GL 2 (Q l ) of [EH], Theorem 5.1.5,
More informationA proof of Selberg s orthogonality for automorphic L-functions
A proof of Selberg s orthogonality for automorphic L-functions Jianya Liu, Yonghui Wang 2, and Yangbo Ye 3 Abstract Let π and π be automorphic irreducible cuspidal representations of GL m and GL m, respectively.
More informationHecke modifications. Aron Heleodoro. May 28, 2013
Hecke modifications Aron Heleodoro May 28, 2013 1 Introduction The interest on Hecke modifications in the geometrical Langlands program comes as a natural categorification of the product in the spherical
More informationARCHIMEDEAN ASPECTS OF SIEGEL MODULAR FORMS OF DEGREE 2
ROCKY MOUNTAIN JOURNAL OF MATHEMATICS Volume 47, Number 7, 207 ARCHIMEDEAN ASPECTS OF SIEGEL MODULAR FORMS OF DEGREE 2 RALF SCHMIDT ABSTRACT. We survey the archimedean representations and Langlands parameters
More informationOn the Cohomology of Some Complex Hyperbolic Arithmetic 3-Manifolds
Commun Math Stat (2013) 1:315 329 DOI 10.1007/s40304-013-0017-3 On the Cohomology of Some Complex Hyperbolic Arithmetic 3-Manifolds Jian-Shu Li Binyong Sun Received: 15 August 2013 / Accepted: 21 September
More informationSOME REMARKS ON DEGENERATE PRINCIPAL SERIES. Chris Jantzen
pacific journal of mathematics Vol. 186, No. 1, 1998 SOME REMARKS ON DEGENERATE PRINCIPAL SERIES Chris Jantzen In this paper, we give a criterion for the irreducibility of certain induced representations,
More informationA NOTE ON REAL ENDOSCOPIC TRANSFER AND PSEUDO-COEFFICIENTS
A NOTE ON REAL ENDOSCOPIC TRANSFER AND PSEUDO-COEFFICIENTS D. SHELSTAD 1. I In memory of Roo We gather results about transfer using canonical factors in order to establish some formulas for evaluating
More information15 Elliptic curves and Fermat s last theorem
15 Elliptic curves and Fermat s last theorem Let q > 3 be a prime (and later p will be a prime which has no relation which q). Suppose that there exists a non-trivial integral solution to the Diophantine
More informationReal, Complex, and Quarternionic Representations
Real, Complex, and Quarternionic Representations JWR 10 March 2006 1 Group Representations 1. Throughout R denotes the real numbers, C denotes the complex numbers, H denotes the quaternions, and G denotes
More informationVANISHING OF CERTAIN EQUIVARIANT DISTRIBUTIONS ON SPHERICAL SPACES
VANISHING OF CERTAIN EQUIVARIANT DISTRIBUTIONS ON SPHERICAL SPACES AVRAHAM AIZENBUD AND DMITRY GOUREVITCH Abstract. We prove vanishing of z-eigen distributions on a spherical variety of a split real reductive
More informationSimpler form of the trace formula for GL 2 (A)
Simpler form of the trace formula for GL 2 (A Last updated: May 8, 204. Introduction Retain the notations from earlier talks on the trace formula and Jacquet Langlands (especially Iurie s talk and Zhiwei
More informationThe Casselman-Shalika Formula for a Distinguished Model
The Casselman-Shalika ormula for a Distinguished Model by William D. Banks Abstract. Unramified Whittaker functions and their analogues occur naturally in number theory as terms in the ourier expansions
More informationDUALITY, CENTRAL CHARACTERS, AND REAL-VALUED CHARACTERS OF FINITE GROUPS OF LIE TYPE
DUALITY, CENTRAL CHARACTERS, AND REAL-VALUED CHARACTERS OF FINITE GROUPS OF LIE TYPE C. RYAN VINROOT Abstract. We prove that the duality operator preserves the Frobenius- Schur indicators of characters
More informationCOUNTING MOD l SOLUTIONS VIA MODULAR FORMS
COUNTING MOD l SOLUTIONS VIA MODULAR FORMS EDRAY GOINS AND L. J. P. KILFORD Abstract. [Something here] Contents 1. Introduction 1. Galois Representations as Generating Functions 1.1. Permutation Representation
More informationA note on trilinear forms for reducible representations and Beilinson s conjectures
A note on trilinear forms for reducible representations and Beilinson s conjectures M Harris and A J Scholl Introduction Let F be a non-archimedean local field, and π i (i = 1, 2, 3) irreducible admissible
More informationRepresentation Theory
Part II Year 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 2018 Paper 1, Section II 19I 93 (a) Define the derived subgroup, G, of a finite group G. Show that if χ is a linear character
More informationA SIEGEL-WEIL FORMULA FOR AUTOMORPHIC CHARACTERS: CUBIC VARIATION OF A THEME OF SNITZ
A SIEGEL-WEIL FORMULA FOR AUTOMORPHIC CHARACTERS: CUBIC VARIATION OF A THEME OF SNITZ WEE TECK GAN 1. Introduction This paper is largely inspired by the 2003 Ph.D. thesis [S] of Kobi Snitz, written under
More informationSPLITTING FIELDS OF CHARACTERISTIC POLYNOMIALS IN ALGEBRAIC GROUPS
SPLITTING FIELDS OF CHARACTERISTIC POLYNOMIALS IN ALGEBRAIC GROUPS E. KOWALSKI In [K1] and earlier in [K2], questions of the following type are considered: suppose a family (g i ) i of matrices in some
More informationTATE CONJECTURES FOR HILBERT MODULAR SURFACES. V. Kumar Murty University of Toronto
TATE CONJECTURES FOR HILBERT MODULAR SURFACES V. Kumar Murty University of Toronto Toronto-Montreal Number Theory Seminar April 9-10, 2011 1 Let k be a field that is finitely generated over its prime field
More informationSPHERICAL UNITARY REPRESENTATIONS FOR REDUCTIVE GROUPS
SPHERICAL UNITARY REPRESENTATIONS FOR REDUCTIVE GROUPS DAN CIUBOTARU 1. Classical motivation: spherical functions 1.1. Spherical harmonics. Let S n 1 R n be the (n 1)-dimensional sphere, C (S n 1 ) the
More information0 A. ... A j GL nj (F q ), 1 j r
CHAPTER 4 Representations of finite groups of Lie type Let F q be a finite field of order q and characteristic p. Let G be a finite group of Lie type, that is, G is the F q -rational points of a connected
More information