Distribution of Fourier coefficients of primitive forms
|
|
- Augustine Hodge
- 5 years ago
- Views:
Transcription
1 Distribution of Fourier coefficients of primitive forms Jie WU Institut Élie Cartan Nancy CNRS et Nancy-Université, France Clermont-Ferrand, le 25 Juin 2008
2 2 Presented work [1] E. Kowalski, O. Robert & J. Wu, Small gaps in coefficients of L-functions and B-free numbers in short intervals, Revista Mat. Iberoamericana 23 (2007), No. 1, [2] Y.-K. & J. Wu, The number of Hecke eigenvalues of same signs, Preprint 2008.
3 3 1. Motivation Ramanujan s function τ(n) For =m z > 0, define (z) := e 2πiz Y (1 e 2πinz ) 24 =: X τ(n)e 2πinz. n=1 n=1 Ramanujan s conjecture τ(n) 6 d(n)n 11/2 (n > 1) where d(n) is the divisor function. This conjecture has been proved by Deligne (1974).
4 4 Lehmer s conjecture τ(n) 6= 0 (n > 1) This is open! Two partial results on Lehmer s conjecture Lehmer (1959) : τ(n) 6= 0 for n Serre (1981) : {n 6 x : τ(n) 6= 0} αx (x, α > 0). Questions (i) α = 1? (Nonvanishing of τ(n)) 1 X (ii) lim 1 = 1? (Signs of τ(n)) x x 2 n6x, τ(n) 0
5 5 2. Modular forms Notation k := integer > 2, N := squarefree integer, log r := the r-fold iterated logarithm, χ 0 := trivial Dirichlet character (mod N), χ := Dirichlet character (mod N) such that χ( 1) = ( 1) k. Cusp forms Denote by S k (N, χ) the set of all cusp forms of weight k and of level N with nebentypus χ.
6 6 Decomposition of S k (N, χ) S k (N, χ) equipped with the Petersson inner product h, i is a finite dimensional Hilbert space and we have S k (N, χ) = S k(n, [ χ) S ] k (N, χ), where S k [(N, χ) is the linear subspace of S k(n, χ) spanned by all forms of type f(dz), where d N and f S k (N 0, χ 0 ) with N 0 < N and dn 0 N. Here χ 0 (mod N 0 ) is the character which induces χ. S ] k (N, χ) is the linear subspace of S k (N, χ) orthogonal to S k [ (N, χ) with respect to h, i. Newforms Denote by Sk (N, χ) the set of all newforms in S] k (N, χ). It constitutes a base of S ] k (N, χ). We can prove (z) S 12 (1) := S 12 (1, χ 0 ).
7 7 Fourier development of f Sk (N, χ) at X f(z) = λ f (n)n (k 1)/2 e 2πinz (=m z > 0), n=1 where λ f (n) has the following properties: (i) λ f (1) = 1, (ii) T n f = λ f (n)n (k 1)/2 f for any n > 1, (iii) for all integers m > 1 and n > 1, λ f (m)λ f (n) = X d (m,n) where T n is the nth Hecke s operator. χ(d)λ f µ mn d 2 (iv) Further if f S k (N, χ 0), then λ f (n) R for n > 1.,
8 Deligne s inequality 8 Deligne (1974): If f S k (N, χ), then p, α f (p), β f (p) such that ( αf (p) = ±p 1/2, β f (p) = 0 if p N and α f (p) = 1, α f (p)β f (p) = χ(p) if p - N λ f (p ν ) = α f (p) ν + α f (p) ν 1 β f (p) + + β f (p) ν ( ν > 0). In particular More generally λ f (p ν ) 6 ν + 1 ( p and ν > 0). λ f (n) 6 d(n) (n > 1) where d(n) is divisor function.
9 9 3. Nonvanishing of λ f (n) Notation f S k (N, χ) : P f := {p : λ f (p) = 0}. Forms of CM type Ribet (1977): If f Sk cm(n, χ) (the subspace of S k(n, χ) spanned by all CM forms), then Ø ØP f [1, x] Ø = x µ x 2 log x + O (log x) 2. By using Landau s method, we can prove α > 0 such that for x, X 1 αx X, 1 x. log x n6x, λ f (n)6=0 n6x, λ f (n)=0
10 Lang-Trotter s conjecture If f S k (N, χ)rscm k 10 (N, χ), then Ø ØP f [1, x] Ø Ø ø f Forms of non-cm type x/ log x if k = 2, log 2 x if k = 3, 1 if k > 4. Serre (1981): If f Sk (N, χ)rscm k (N, χ), then δ < 1 2, Ø (1) ØP f [1, x] Ø x ø f,δ (log x) 1+δ. From this, we deduce that there are constants C > c > 0 such that X (2) cx Cx for x > x 0 (f). n6x, λ f (n)6=0
11 11 Serre s function i f (n) For f S k (N, χ)rsk cm (N, χ), we define i f (n) := max{i : λ f (n + j) = 0 (0 < j 6 i)}. The inequalities (2) imply that (3) i f (n) ø f n (n > 1), since 0 = X n<m6n+i f (n) λ f (m)6=0 1 > c n + i f (n) Cn = ci f (n) (C c)n. Serre s question (1981) Find constant θ < 1 such that (4) i f (n) ø f,θ n θ ( n > 1).
12 12 Remark 1. Balog & Ono (2001) remarked that Serre s question has been resolved before proposing it! There is two methods! Rankin-Selberg convolution (The first method) Rankin (1939) and Selberg (1940): For f Sk (N, χ), we have X λ f (n) 2 = A f x + O f (x 3/5 ) (A f > 0). n6x This implies trivially (4) with θ = 3 5 X, X since 0 = λ f (m) 2 = λ f (m) 2 X n<m6n+i f (n) m6n+i f (n) m6n = A f n + if (n) A f n + O (n + i f (n)) 3/5 + n 3/5 = A f i f (n) + O(n 3/5 ) (via (3)). λ f (m) 2
13 13 Erdős B-free numbers (The second method) Let B = {b k N : 1 < b 1 < < b k < } such that (5) X i=1 1 b i < and (b i, b j ) = 1 (i 6= j). An integer n > 1 is called B-free if b - n for any b B. The set of all B-free numbers is denoted by A = A(B). Taking B = {p 2 : p prime} =: P 2, then A(P 2 ) is the set of all squarefree integers.
14 14 (6) Erdős (1966): θ < 1 such that for x > x 0 (B, θ), Ø x < n 6 x + x θ : n is B free Ø Ø B,θ x θ. The records on θ: θ = 1 2 θ = 9 20 θ = 5 12 θ = θ = θ = θ = ε = ε (Szemerédi, 1973), = ε (Bantle & Grupp, 1986), = ε (Wu, 1990), = ε (Wu, 1993), = ε (Wu, 1994) and (Zhai, 2000), = ε (Sargos & Wu, 2000), (Conjecture), where ε is an arbitrarily small positive number.
15 15 Application of B-free numbers Take P f := {p : λ f (p) = 0}, B f := P f {p 2 : p / P f }. The multiplicativity of λ f (m) implies m is B f free λ f (m) 6= 0 In fact, if m is B f -free, we have (i) if p m, then λ f (p) 6= 0, (ii) m = p 1 p j with λ f (p i ) 6= 0 for 1 6 i 6 j and p 1 < < p j, (iii) λ f (m) = λ f (p 1 ) λ f (p j ) 6= 0.
16 16 In view of Serre s (1), B f satisfies (5). Thus Erdős (6) implies : θ < 1 such that for x > x 0 (f, θ) X X 1 > 1 f,θ x θ, x<m6x+x θ λ f (m)6=0 from which we deduce (taking x = n) for n > x 0 (f, θ). Thus x<m6x+x θ m is B f free i f (n) < n θ i f (n) ø f,θ n θ (n > 1). In particular, the value θ = ε is admissible.
17 17 Theorem 1 (Kowalski, Robert & Wu, 2007). Suppose that Ø (7) ØP f [1, x] Ø ø f x ρ /(log x) Θ ρ (x > 2) for any f Sk (N, χ)rscm k (N, χ), where ρ [0, 1] and Θ ρ R such that Θ 1 > 1. Then for any f S k (N, χ)rsk cm (N, χ) we have i f (n) ø f,ε n θ(ρ)+ε, where θ(ρ) = 1/4 if 0 6 ρ 6 1/3, 10ρ/(19ρ + 7) if 1/3 < ρ 6 9/17, 3ρ/(4ρ + 3) if 9/17 < ρ 6 15/28, 5/16 if 15/28 < ρ 6 5/8, (22ρ/(24ρ + 29) if 5/8 < ρ 6 9/10, 7ρ/(9ρ + 8) if 9/10 < ρ 6 1.
18 18 Corollary 2 (KRW, 2007). For any form f S k (N, χ)rsk cm (N, χ), we have i f (n) ø f,ε n 7/17+ε for all n > 1. [(1) (7) with ρ = 1 and Θ 1 = 1 + δ] θ(1) = improves very slightly Balog & Ono s Corollary 3 (KRW, 2007). For any f S k (N, χ)rsk cm (N, χ), Lang- Trotter s conjecture implies i f (n) ø f,ε n 10/33+ε for all n > 1. [Lang-Trotter s conjecture implies (7) with ρ = 1 2 and Θ 1/2 = 1] θ( 1 2 ) = improves considerably Alkan s Corollary 4 (KRW, 2007). Let E/Q be an elliptic curve without CM and f the associated newform. Then i f (n) ø E,ε n 33/94+ε for all n > 1. [For elliptic curve, Elkies proved (7) with ρ = 3 4 and Θ 3/4 = 0] θ( 3 4 ) = improves considerably Alkan s
19 19 4. Further improvements Expected result θ(0) = 0 in Theorem 1 Defect of the constraint squarefree θ(0) = 1 4 6= 0 in Theorem 1 Squarefree integers in short intervals Filaseta & Trifonov (1992) : c > 0 such that Ø x < n 6 x + cx 1/5 log x : n is squarefree Ø Ø x 1/5 log x. Remark 2. With the multiplicative constraint squarefree, we have few chance for obtaining θ(0) = 0.
20 20 Treatment without the constraint squarefree Lemma 1 (KRW, 2007). Let f S k (N, χ). Then ν f such that for any p - N: either λ f (p ν ) 6= 0 (ν > 0) or ν 6 ν f such that λ f (p ν ) = 0. Lemma 2 (KRW, 2007). For f S k (N, χ)rscm k (N, χ), we define P f,ν := p : λ f (p ν ) = 0 and λ f (p j ) 6= 0 (0 6 j < ν), B f := P f,1 P f,2 P f,νf. Then for any δ < 1 2, we have Ø ØB f [1, x] Ø Ø ø f,δ x (log x) 1+δ. Remark 3. This contains Serre s (1) and leads us to propose a generalized Lang-Trotter s conjecture.
21 21 Generalized Lang-Trotter s conjecture Conjecture 1. If f Sk (N, χ)rscm k (N, χ), then Ø ØB f [1, x] Ø x/ log x if k = 2, ø f log 2 x if k = 3, 1 if k > 4. Lemma 3 (KRW, 2007). If f S k (N) such that λ f (n) Z for any n > 1 (for example for elliptic curves), then Conjecture 1 is equivalent to Lang-Trotter s conjecture. Relation between B f -free and λ f (n) 6= 0 n is B f -free λ f (n) 6= 0
22 22 Theorem 5 (KRW, 2007). Suppose that Ø ØB f [1, x] Ø x ρ ø f (log x) Θ ρ (x > 2) for any f Sk (N, χ)rscm k (N, χ), where ρ [0, 1] and Θ ρ R such that Θ 1 > 1. Then for any f S k (N, χ)rsk cm (N, χ) and ε > 0, we have i f (n) ø f,ε n θ(ρ)+ε (n > 1), where θ(ρ) = ρ/(1 + ρ). In particular θ(0) = 0. Corollary 6 (KRW, 2007). Let k > 3. Suppose that Conjecture 1 holds for all f Sk (N, χ)rscm k (N, χ). Then for any ε > 0 and all f S k (N, χ)rsk cm (N, χ), we have i f (n) ø f,ε n ε (n > 1).
23 23 5. Katz conjecture and nonvanishing problem Question Is there a cusp form f such that λ f (n) 6= 0 for any n > 1? Katz conjecture (1972) Let S(1, 1; p) be the sum of Kloosterman. Then L(s, Kl) := Y 1 S(1, 1; p)p s + p 1 2s 1 X =: λ Kl (n)n s p is L-function of a non-holomorphic cusp form of weight 2 over SL 2 (Z). n>1 Theorem 7 (KRW, 2007). We have λ Kl (n) 6= 0 for any n > 1. Remark 4. This gives an affirmative answer conditionally. But very probably Katz conjecture should not hold.
24 24 6. Sign changes of Hecke s eigenvalues Sato-Tate s conjecture For any 2 6 α 6 β 6 2 and any f Sk (N) := S k (N, χ 0), we have {p 6 x : α 6 λ f (p) 6 β} x log x Z β α 4 t 2 2π dt (x ). Here 4 t 2 /(2π) dt is called Sate-Tate s measure. Hecke s eigenvalues of same signs For f Sk (N), define N ± f (x) := X 1. n6x, (n,n)=1 λ f (n) 0
25 It is natural to conjecture lim x 25 N ± f (x) Kohnen, Lau & Shparlinski (2007): N ± f (x) x f (log x) 17 x = 1 2. (x > x 0 (f)). Wu (2008): The exponent 17 can be reduced to 1 1/ and 2 16/(3π) if we assume Sato-Tate s conjecture. Theorem 8 (Lau & Wu, 2008). For any f Sk (N), we have for all x > x 0 (f). N ± f (x) f x
26 26 Sign changes of Hecke s eigenvalues Kohnen, Lau & Shparlinski (2007): there are absolute constants η < 1 and A > 0 such that for any f Sk (N) we have N ± f (x + xη ) N ± f (x) > 0 (x > (kn)a ). Theorem 9 (Lau & Wu, 2008). Let f Sk (N). There is an absolute constant c > 0 such that for any ε > 0 and x > cn 1+ε x 0 (k), we have N ± f (x + cn 1/2+ε x 1/2 ) N ± f (x) ε x 1/4 ε, where x 0 (k) is a suitably large constant depending on k and the implied constant in ε depends only on ε. Remark 5. λ f (n) has a sign-change in interval x, x+cn 1/2+ε x 1/2 for all sufficiently large x.
27 27 7. Ideas of the proof of Theorem 1 Recall B f := P f {p 2 : p / P f }. The existence of B f -free numbers in short intervals is a problem of sieve. (a) System of weights for detecting B f -free numbers; (b) Exponential sum for controlling the error terms in the sieve. Alkan s condition on θ δ 1 (θ) + θ + θ/ρ > 1, where δ 1 (θ) is increasing and given by exponential sums of type II. Our condition on θ δ 2 (θ) + 2θ/ρ > 1. where δ 2 (θ) is increasing and given by exponential sums of type I.
28 28 Two improvements (i) By exploiting {p 2 : p / P f }, we improve θ + θ/ρ into 2θ/ρ. (ii) Our system of weights allows us to bring back to estimate bilinear forms of type I : X X ψ n r mn (x, x θ ), M6m<2M N6n<2N instead of type II (as in the work of Alkan) X X φ m ψ n r mn (x, x θ ), M6m<2M N6n<2N where φ m 6 1, ψ n 6 1 and r d (x, y) := {x < n 6 x + y : d n} y/d. Thus we have δ 2 (θ) > δ 1 (θ).
29 29 Multiple exponential sums : By the Fourier analyse, the estimate of bilinear forms can be transformed into estimate of multiple exponential sums X H6h<2H X M6m<2M X N6n<2N φ h ψ n e µx hα m β n γ H α M β N γ where e(t) := e 2πit, φ h 6 1, ψ n 6 1, α, β, γ R. According the size of ρ, we use the methods of Fouvry Iwaniec (with Robert Sargos refinement) and of Heath-Brown to estimate this sum.,
On the number of dominating Fourier coefficients of two newforms
On the number of dominating Fourier coefficients of two newforms Liubomir Chiriac Abstract Let f = n 1 λ f (n)n (k 1 1)/2 q n and g = n 1 λg(n)n(k 2 1)/2 q n be two newforms with real Fourier coeffcients.
More informationSmall gaps in coefficients of L-functions and B-free numbers in short intervals
Rev. Mat. Iberoamericana 23 (2007), no., 28 326 Small gaps in coefficients of L-functions and B-free numbers in short intervals Emmanuel Kowalski, Olivier Robert and Jie Wu Abstract We discuss questions
More informationSIMULTANEOUS SIGN CHANGE OF FOURIER-COEFFICIENTS OF TWO CUSP FORMS
SIMULTANEOUS SIGN CHANGE OF FOURIER-COEFFICIENTS OF TWO CUSP FORMS SANOLI GUN, WINFRIED KOHNEN AND PURUSOTTAM RATH ABSTRACT. We consider the simultaneous sign change of Fourier coefficients of two modular
More informationDETERMINATION OF GL(3) CUSP FORMS BY CENTRAL VALUES OF GL(3) GL(2) L-FUNCTIONS, LEVEL ASPECT
DETERMIATIO OF GL(3 CUSP FORMS BY CETRAL ALUES OF GL(3 GL( L-FUCTIOS, LEEL ASPECT SHEG-CHI LIU Abstract. Let f be a self-dual Hecke-Maass cusp form for GL(3. We show that f is uniquely determined by central
More informationShifted Convolution L-Series Values of Elliptic Curves
Shifted Convolution L-Series Values of Elliptic Curves Nitya Mani (joint with Asra Ali) December 18, 2017 Preliminaries Modular Forms for Γ 0 (N) Modular Forms for Γ 0 (N) Definition The congruence subgroup
More informationA NOTE ON THE SHIMURA CORRESPONDENCE AND THE RAMANUJAN τ(n) FUNCTION
A NOTE ON THE SHIMURA CORRESPONDENCE AND THE RAMANUJAN τ(n) FUNCTION KEN ONO Abstract. The Shimura correspondence is a family of maps which sends modular forms of half-integral weight to forms of integral
More informationGUO-NIU HAN AND KEN ONO
HOOK LENGTHS AND 3-CORES GUO-NIU HAN AND KEN ONO Abstract. Recently, the first author generalized a formula of Nekrasov and Okounkov which gives a combinatorial formula, in terms of hook lengths of partitions,
More informationBulletin of the Iranian Mathematical Society
ISSN: 1017-060X (Print) ISSN: 1735-8515 (Online) Special Issue of the Bulletin of the Iranian Mathematical Society in Honor of Professor Freydoon Shahidi s 70th birthday Vol. 43 (2017), No. 4, pp. 313
More informationAnalytic Number Theory
American Mathematical Society Colloquium Publications Volume 53 Analytic Number Theory Henryk Iwaniec Emmanuel Kowalski American Mathematical Society Providence, Rhode Island Contents Preface xi Introduction
More informationwith k = l + 1 (see [IK, Chapter 3] or [Iw, Chapter 12]). Moreover, f is a Hecke newform with Hecke eigenvalue
L 4 -NORMS OF THE HOLOMORPHIC DIHEDRAL FORMS OF LARGE LEVEL SHENG-CHI LIU Abstract. Let f be an L -normalized holomorphic dihedral form of prime level q and fixed weight. We show that, for any ε > 0, for
More informationRepresentations of integers as sums of an even number of squares. Özlem Imamoḡlu and Winfried Kohnen
Representations of integers as sums of an even number of squares Özlem Imamoḡlu and Winfried Kohnen 1. Introduction For positive integers s and n, let r s (n) be the number of representations of n as a
More informationDimensions of the spaces of cusp forms and newforms on Γ 0 (N) and Γ 1 (N)
Journal of Number Theory 11 005) 98 331 www.elsevier.com/locate/jnt Dimensions of the spaces of cusp forms and newforms on Γ 0 N) and Γ 1 N) Greg Martin Department of Mathematics, University of British
More informationRANKIN-COHEN BRACKETS AND SERRE DERIVATIVES AS POINCARÉ SERIES. φ k M = 1 2
RANKIN-COHEN BRACKETS AND SERRE DERIVATIVES AS POINCARÉ SERIES BRANDON WILLIAMS Abstract. We give expressions for the Serre derivatives of Eisenstein and Poincaré series as well as their Rankin-Cohen brackets
More informationClass Number Type Relations for Fourier Coefficients of Mock Modular Forms
Class Number Type Relations for Fourier Coefficients of Mock Modular Forms Michael H. Mertens University of Cologne Lille, March 6th, 2014 M.H. Mertens (University of Cologne) Class Number Type Relations
More informationSANDRO BETTIN, CORENTIN PERRET-GENTIL, AND MAKSYM RADZIWI L L
A NOTE ON THE DIMENSION OF THE LARGEST SIMPLE HECKE SUBMODULE SANDRO BETTIN, CORENTIN PERRET-GENTIL, AND MAKSYM RADZIWI L L Abstract. For k even, let d k,n denote the dimension of the largest simple Hecke
More informationarxiv: v2 [math.nt] 7 Feb 2009
UFR S.T.M.I.A. École Doctorale IAE + M Université Henri Poincaré - Nancy I D.F.D. Mathématiques arxiv:0902.0955v2 [math.nt] 7 Feb 2009 THÈSE présentée par Yan QU pour l'obtention du Doctorat de l'université
More informationComputing central values of twisted L-functions of higher degre
Computing central values of twisted L-functions of higher degree Computational Aspects of L-functions ICERM November 13th, 2015 Computational challenges We want to compute values of L-functions on the
More informationPATTERNS OF PRIMES IN ARITHMETIC PROGRESSIONS
PATTERNS OF PRIMES IN ARITHMETIC PROGRESSIONS JÁNOS PINTZ Rényi Institute of the Hungarian Academy of Sciences CIRM, Dec. 13, 2016 2 1. Patterns of primes Notation: p n the n th prime, P = {p i } i=1,
More informationPolygonal Numbers, Primes and Ternary Quadratic Forms
Polygonal Numbers, Primes and Ternary Quadratic Forms Zhi-Wei Sun Nanjing University Nanjing 210093, P. R. China zwsun@nju.edu.cn http://math.nju.edu.cn/ zwsun August 26, 2009 Modern number theory has
More informationPARITY OF THE COEFFICIENTS OF KLEIN S j-function
PARITY OF THE COEFFICIENTS OF KLEIN S j-function CLAUDIA ALFES Abstract. Klein s j-function is one of the most fundamental modular functions in number theory. However, not much is known about the parity
More informationSign changes of Fourier coefficients of cusp forms supported on prime power indices
Sign changes of Fourier coefficients of cusp forms supported on prime power indices Winfried Kohnen Mathematisches Institut Universität Heidelberg D-69120 Heidelberg, Germany E-mail: winfried@mathi.uni-heidelberg.de
More informationConverse theorems for modular L-functions
Converse theorems for modular L-functions Giamila Zaghloul PhD Seminars Università degli studi di Genova Dipartimento di Matematica 10 novembre 2016 Giamila Zaghloul (DIMA unige) Converse theorems 10 novembre
More informationA Motivated Introduction to Modular Forms
May 3, 2006 Outline of talk: I. Motivating questions II. Ramanujan s τ function III. Theta Series IV. Congruent Number Problem V. My Research Old Questions... What can you say about the coefficients of
More informationMock Modular Forms and Class Number Relations
Mock Modular Forms and Class Number Relations Michael H. Mertens University of Cologne 28th Automorphic Forms Workshop, Moab, May 13th, 2014 M.H. Mertens (University of Cologne) Class Number Relations
More informationEQUIDISTRIBUTION OF SIGNS FOR HILBERT MODULAR FORMS OF HALF-INTEGRAL WEIGHT
EQUIDISTRIBUTION OF SIGNS FOR HILBERT MODULAR FORMS OF HALF-INTEGRAL WEIGHT SURJEET KAUSHIK, NARASIMHA KUMAR, AND NAOMI TANABE Abstract. We prove an equidistribution of signs for the Fourier coefficients
More informationARITHMETIC OF THE 13-REGULAR PARTITION FUNCTION MODULO 3
ARITHMETIC OF THE 13-REGULAR PARTITION FUNCTION MODULO 3 JOHN J WEBB Abstract. Let b 13 n) denote the number of 13-regular partitions of n. We study in this paper the behavior of b 13 n) modulo 3 where
More informationUsing approximate functional equations to build L functions
Using approximate functional equations to build L functions Pascal Molin Université Paris 7 Clermont-Ferrand 20 juin 2017 Example : elliptic curves Consider an elliptic curve E /Q of conductor N and root
More informationBILINEAR FORMS WITH KLOOSTERMAN SUMS
BILINEAR FORMS WITH KLOOSTERMAN SUMS 1. Introduction For K an arithmetic function α = (α m ) 1, β = (β) 1 it is often useful to estimate bilinear forms of the shape B(K, α, β) = α m β n K(mn). m n complex
More informationTATE-SHAFAREVICH GROUPS OF THE CONGRUENT NUMBER ELLIPTIC CURVES. Ken Ono. X(E N ) is a simple
TATE-SHAFAREVICH GROUPS OF THE CONGRUENT NUMBER ELLIPTIC CURVES Ken Ono Abstract. Using elliptic modular functions, Kronecker proved a number of recurrence relations for suitable class numbers of positive
More informationHECKE OPERATORS ON CERTAIN SUBSPACES OF INTEGRAL WEIGHT MODULAR FORMS.
HECKE OPERATORS ON CERTAIN SUBSPACES OF INTEGRAL WEIGHT MODULAR FORMS. MATTHEW BOYLAN AND KENNY BROWN Abstract. Recent works of Garvan [2] and Y. Yang [7], [8] concern a certain family of half-integral
More informationUniform Distribution of Zeros of Dirichlet Series
Uniform Distribution of Zeros of Dirichlet Series Amir Akbary and M. Ram Murty Abstract We consider a class of Dirichlet series which is more general than the Selberg class. Dirichlet series in this class,
More informationUniform Distribution of Zeros of Dirichlet Series
Uniform Distribution of Zeros of Dirichlet Series Amir Akbary and M. Ram Murty Abstract We consider a class of Dirichlet series which is more general than the Selberg class. Dirichlet series in this class,
More informationdenote the Dirichlet character associated to the extension Q( D)/Q, that is χ D
January 0, 1998 L-SERIES WITH NON-ZERO CENTRAL CRITICAL VALUE Kevin James Department of Mathematics Pennsylvania State University 18 McAllister Building University Park, Pennsylvania 1680-6401 Phone: 814-865-757
More informationTWISTS OF ELLIPTIC CURVES. Ken Ono
TWISTS OF ELLIPTIC CURVES Ken Ono Abstract. If E is an elliptic curve over Q, then let E(D) denote the D quadratic twist of E. It is conjectured that there are infinitely many primes p for which E(p) has
More informationDIVISIBILITY AND DISTRIBUTION OF PARTITIONS INTO DISTINCT PARTS
DIVISIBILITY AND DISTRIBUTION OF PARTITIONS INTO DISTINCT PARTS JEREMY LOVEJOY Abstract. We study the generating function for (n), the number of partitions of a natural number n into distinct parts. Using
More informationNON-VANISHING OF THE PARTITION FUNCTION MODULO SMALL PRIMES
NON-VANISHING OF THE PARTITION FUNCTION MODULO SMALL PRIMES MATTHEW BOYLAN Abstract Let pn be the ordinary partition function We show, for all integers r and s with s 1 and 0 r < s, that #{n : n r mod
More informationThree-dimensional imprimitive representations of PSL 2 (Z) and their associated vector-valued modular forms
Three-dimensional imprimitive representations of PSL 2 (Z) and their associated vector-valued modular forms U-M Automorphic forms workshop, March 2015 1 Definition 2 3 Let Γ = PSL 2 (Z) Write ( 0 1 S =
More informationUniversität Regensburg Mathematik
Universität Regensburg Mathematik On projective linear groups over finite fields as Galois groups over the rational numbers Gabor Wiese Preprint Nr. 14/2006 On projective linear groups over finite fields
More informationAlmost Primes of the Form p c
Almost Primes of the Form p c University of Missouri zgbmf@mail.missouri.edu Pre-Conference Workshop of Elementary, Analytic, and Algorithmic Number Theory Conference in Honor of Carl Pomerance s 70th
More information(Not only on the Paramodular Conjecture)
Experiments on Siegel modular forms of genus 2 (Not only on the Paramodular Conjecture) Modular Forms and Curves of Low Genus: Computational Aspects ICERM October 1st, 2015 Experiments with L-functions
More informationThe Galois Representation Associated to Modular Forms (Part I)
The Galois Representation Associated to Modular Forms (Part I) Modular Curves, Modular Forms and Hecke Operators Chloe Martindale May 20, 2015 Contents 1 Motivation and Background 1 2 Modular Curves 2
More informationSHIMURA LIFTS OF HALF-INTEGRAL WEIGHT MODULAR FORMS ARISING FROM THETA FUNCTIONS
SHIMURA LIFTS OF HALF-INTEGRAL WEIGHT MODULAR FORMS ARISING FROM THETA FUNCTIONS DAVID HANSEN AND YUSRA NAQVI Abstract. In 1973, Shimura [8] introduced a family of correspondences between modular forms
More informationOn the arithmetic of modular forms
On the arithmetic of modular forms Gabor Wiese 15 June 2017 Modular forms There are five fundamental operations: addition, subtraction, multiplication, division, and modular forms. Martin Eichler (1912-1992)
More informationProducts of ratios of consecutive integers
Products of ratios of consecutive integers Régis de la Bretèche, Carl Pomerance & Gérald Tenenbaum 27/1/23, 9h26 For Jean-Louis Nicolas, on his sixtieth birthday 1. Introduction Let {ε n } 1 n
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 informationTernary Diophantine Equations via Galois Representations and Modular Forms
Canad. J. Math. Vol. 56 (1), 2004 pp. 23 54 Ternary Diophantine Equations via Galois Representations and Modular Forms Michael A. Bennett and Chris M. Skinner Abstract. In this paper, we develop techniques
More informationOn the Shifted Convolution Problem
On the Shifted Convolution Problem P. Michel (Univ. Montpellier II & Inst. Univ. France) May 5, 2003 1. The Shifted convolution Problem (SCP) Given g(z) a primitive modular form of some level D and nebentypus
More informationPiatetski-Shapiro primes from almost primes
Piatetski-Shapiro primes from almost primes Roger C. Baker Department of Mathematics, Brigham Young University Provo, UT 84602 USA baker@math.byu.edu William D. Banks Department of Mathematics, University
More informationMod p Galois representations attached to modular forms
Mod p Galois representations attached to modular forms Ken Ribet UC Berkeley April 7, 2006 After Serre s article on elliptic curves was written in the early 1970s, his techniques were generalized and extended
More informationHecke-Operators. Alex Maier. 20th January 2007
Hecke-Operators Alex Maier 20th January 2007 Abstract At the beginning we introduce the Hecke-operators and analyse some of their properties. Then we have a look at normalized eigenfunctions of them and
More informationLarge Sieves and Exponential Sums. Liangyi Zhao Thesis Director: Henryk Iwaniec
Large Sieves and Exponential Sums Liangyi Zhao Thesis Director: Henryk Iwaniec The large sieve was first intruded by Yuri Vladimirovich Linnik in 1941 and have been later refined by many, including Rényi,
More informationThat is, there exists a constant c(k, ε) > 0 depending at most on k and ε such that d k,n > c(k, ε)n 1 ε for all square-free N 1.
A NOTE ON THE DIMENSION OF THE LARGEST SIMPLE HECKE SUBMODULE SANDRO BETTIN, CORENTIN PERRET-GENTIL, AND MAKSYM RADZIWI L L Abstract. For k even, let d k,n denote the dimension of the largest simple Hecke
More informationRamanujan-type Congruences for Broken 2-Diamond Partitions Modulo 3
Ramanujan-type Congruences for Broken 2-Diamond Partitions Modulo 3 William Y.C. Chen 1, Anna R.B. Fan 2 and Rebecca T. Yu 3 1,2,3 Center for Combinatorics, LPMC-TJKLC Nankai University, Tianjin 300071,
More informationModular forms, combinatorially and otherwise
Modular forms, combinatorially and otherwise p. 1/103 Modular forms, combinatorially and otherwise David Penniston Sums of squares Modular forms, combinatorially and otherwise p. 2/103 Modular forms, combinatorially
More informationRANKIN-COHEN BRACKETS AND VAN DER POL-TYPE IDENTITIES FOR THE RAMANUJAN S TAU FUNCTION
RANKIN-COHEN BRACKETS AND VAN DER POL-TYPE IDENTITIES FOR THE RAMANUJAN S TAU FUNCTION B. RAMAKRISHNAN AND BRUNDABAN SAHU Abstract. We use Rankin-Cohen brackets for modular forms and quasimodular forms
More informationp-adic iterated integrals, modular forms of weight one, and Stark-Heegner points.
Stark s Conjecture and related topics p-adic iterated integrals, modular forms of weight one, and Stark-Heegner points. Henri Darmon San Diego, September 20-22, 2013 (Joint with Alan Lauder and Victor
More informationDEDEKIND S ETA-FUNCTION AND ITS TRUNCATED PRODUCTS. George E. Andrews and Ken Ono. February 17, Introduction and Statement of Results
DEDEKIND S ETA-FUNCTION AND ITS TRUNCATED PRODUCTS George E. Andrews and Ken Ono February 7, 2000.. Introduction and Statement of Results Dedekind s eta function ηz, defined by the infinite product ηz
More informationLINEAR RELATIONS BETWEEN MODULAR FORM COEFFICIENTS AND NON-ORDINARY PRIMES
LINEAR RELATIONS BETWEEN MODULAR FORM COEFFICIENTS AND NON-ORDINARY PRIMES YOUNGJU CHOIE, WINFRIED KOHNEN, AND KEN ONO Appearing in the Bulletin of the London Mathematical Society Abstract. Here we generalize
More informationNUMERICAL EXPLORATIONS OF ELLIPTIC CURVES WITH COMPLEX MULTIPLICATION RAYA BAYOR; IBRAHIMA DIEDHIOU MENTOR: PROF. JORGE PINEIRO
NUMERICAL EXPLORATIONS OF ELLIPTIC CURVES WITH COMPLEX MULTIPLICATION RAYA BAYOR; IBRAHIMA DIEDHIOU MENTOR: PROF. JORGE PINEIRO 1. Presentation of the problem The present project constitutes a numerical
More informationOn Gelfond s conjecture on the sum-of-digits function
On Gelfond s conjecture on the sum-of-digits function Joël RIVAT work in collaboration with Christian MAUDUIT Institut de Mathématiques de Luminy CNRS-UMR 6206, Aix-Marseille Université, France. rivat@iml.univ-mrs.fr
More informationTITLES & ABSTRACTS OF TALKS
TITLES & ABSTRACTS OF TALKS Speaker: Reinier Broker Title: Computing Fourier coefficients of theta series Abstract: In this talk we explain Patterson s method to effectively compute Fourier coefficients
More informationFrom K3 Surfaces to Noncongruence Modular Forms. Explicit Methods for Modularity of K3 Surfaces and Other Higher Weight Motives ICERM October 19, 2015
From K3 Surfaces to Noncongruence Modular Forms Explicit Methods for Modularity of K3 Surfaces and Other Higher Weight Motives ICERM October 19, 2015 Winnie Li Pennsylvania State University 1 A K3 surface
More informationCONGRUENCES FOR BROKEN k-diamond PARTITIONS
CONGRUENCES FOR BROKEN k-diamond PARTITIONS MARIE JAMESON Abstract. We prove two conjectures of Paule and Radu from their recent paper on broken k-diamond partitions. 1. Introduction and Statement of Results
More informationSIGN CHANGES OF COEFFICIENTS OF HALF INTEGRAL WEIGHT MODULAR FORMS
SIGN CHANGES OF COEFFICIENTS OF HALF INTEGRAL WEIGHT MODULAR FORMS JAN HENDRIK BRUINIER AND WINFRIED KOHNEN Abstract. For a half integral weight modular form f we study the signs of the Fourier coefficients
More informationarxiv: v1 [math.nt] 28 Jan 2010
NON VANISHING OF CENTRAL VALUES OF MODULAR L-FUNCTIONS FOR HECKE EIGENFORMS OF LEVEL ONE D. CHOI AND Y. CHOIE arxiv:00.58v [math.nt] 8 Jan 00 Abstract. Let F(z) = n= a(n)qn be a newform of weight k and
More informationON PRIMES IN QUADRATIC PROGRESSIONS & THE SATO-TATE CONJECTURE
ON PRIMES IN QUADRATIC PROGRESSIONS & THE SATO-TATE CONJECTURE LIANGYI ZHAO INSTITUTIONEN FÖR MATEMATIK KUNGLIGA TEKNISKA HÖGSKOLAN (DEPT. OF MATH., ROYAL INST. OF OF TECH.) STOCKHOLM SWEDEN Dirichlet
More informationFERMAT S WORLD A TOUR OF. Outline. Ching-Li Chai. Philadelphia, March, Samples of numbers. 2 More samples in arithemetic. 3 Congruent numbers
Department of Mathematics University of Pennsylvania Philadelphia, March, 2016 Outline 1 2 3 4 5 6 7 8 9 Some familiar whole numbers 1. Examples of numbers 2, the only even prime number. 30, the largest
More informationIntroduction to Modular Forms
Introduction to Modular Forms Lectures by Dipendra Prasad Written by Sagar Shrivastava School and Workshop on Modular Forms and Black Holes (January 5-14, 2017) National Institute of Science Education
More informationGalois Representations
Galois Representations Samir Siksek 12 July 2016 Representations of Elliptic Curves Crash Course E/Q elliptic curve; G Q = Gal(Q/Q); p prime. Fact: There is a τ H such that E(C) = C Z + τz = R Z R Z. Easy
More informationAnalytic number theory for probabilists
Analytic number theory for probabilists E. Kowalski ETH Zürich 27 October 2008 Je crois que je l ai su tout de suite : je partirais sur le Zéta, ce serait mon navire Argo, celui qui me conduirait à la
More informationDifferential operators on Jacobi forms and special values of certain Dirichlet series
Differential operators on Jacobi forms and special values of certain Dirichlet series Abhash Kumar Jha and Brundaban Sahu Abstract We construct Jacobi cusp forms by computing the adjoint of a certain linear
More informationCHIRANJIT RAY AND RUPAM BARMAN
ON ANDREWS INTEGER PARTITIONS WITH EVEN PARTS BELOW ODD PARTS arxiv:1812.08702v1 [math.nt] 20 Dec 2018 CHIRANJIT RAY AND RUPAM BARMAN Abstract. Recently, Andrews defined a partition function EOn) which
More informationarxiv:math/ v3 [math.co] 15 Oct 2006
arxiv:math/060946v3 [math.co] 15 Oct 006 and SUM-PRODUCT ESTIMATES IN FINITE FIELDS VIA KLOOSTERMAN SUMS DERRICK HART, ALEX IOSEVICH, AND JOZSEF SOLYMOSI Abstract. We establish improved sum-product bounds
More informationPARITY OF THE PARTITION FUNCTION. (Communicated by Don Zagier)
ELECTRONIC RESEARCH ANNOUNCEMENTS OF THE AMERICAN MATHEMATICAL SOCIETY Volume 1, Issue 1, 1995 PARITY OF THE PARTITION FUNCTION KEN ONO (Communicated by Don Zagier) Abstract. Let p(n) denote the number
More informationBefore giving the detailed proof, we outline our strategy. Define the functions. for Re s > 1.
Chapter 7 The Prime number theorem for arithmetic progressions 7. The Prime number theorem We denote by π( the number of primes. We prove the Prime Number Theorem. Theorem 7.. We have π( as. log Before
More informationSUM-PRODUCT ESTIMATES IN FINITE FIELDS VIA KLOOSTERMAN SUMS
SUM-PRODUCT ESTIMATES IN FINITE FIELDS VIA KLOOSTERMAN SUMS DERRICK HART, ALEX IOSEVICH, AND JOZSEF SOLYMOSI Abstract. We establish improved sum-product bounds in finite fields using incidence theorems
More informationTHE EFFECTIVE SATO-TATE CONJECTURE AND DENSITIES PERTAINING TO LEHMER-TYPE QUESTIONS JESSE THORNER. A Thesis Submitted to the Graduate Faculty of
THE EFFECTIVE SATO-TATE CONJECTURE AND DENSITIES PERTAINING TO LEHMER-TYPE QUESTIONS BY JESSE THORNER A Thesis Submitted to the Graduate Faculty of WAKE FOREST UNIVERSITY GRADUATE SCHOOL OF ARTS AND SCIENCES
More informationarxiv: v1 [math.nt] 4 Oct 2016
ON SOME MULTIPLE CHARACTER SUMS arxiv:1610.01061v1 [math.nt] 4 Oct 2016 ILYA D. SHKREDOV AND IGOR E. SHPARLINSKI Abstract. We improve a recent result of B. Hanson (2015) on multiplicative character sums
More informationSHIMURA LIFTS OF HALF-INTEGRAL WEIGHT MODULAR FORMS ARISING FROM THETA FUNCTIONS
SHIMURA LIFTS OF HALF-INTEGRAL WEIGHT MODULAR FORMS ARISING FROM THETA FUNCTIONS DAVID HANSEN AND YUSRA NAQVI Abstract In 1973, Shimura [8] introduced a family of correspondences between modular forms
More informationBefore we prove this result, we first recall the construction ( of) Suppose that λ is an integer, and that k := λ+ 1 αβ
600 K. Bringmann, K. Ono Before we prove this result, we first recall the construction ( of) these forms. Suppose that λ is an integer, and that k := λ+ 1 αβ. For each A = Ɣ γ δ 0 (4),let j(a, z) := (
More information(τ) = q (1 q n ) 24. E 4 (τ) = q q q 3 + = (1 q) 240 (1 q 2 ) (1 q 3 ) (1.1)
Automorphic forms on O s+2,2 (R) + and generalized Kac-Moody algebras. Proceedings of the International Congress of Mathematicians, Vol. 1, 2 (Zürich, 1994), 744 752, Birkhäuser, Basel, 1995. Richard E.
More informationAn application of the projections of C automorphic forms
ACTA ARITHMETICA LXXII.3 (1995) An application of the projections of C automorphic forms by Takumi Noda (Tokyo) 1. Introduction. Let k be a positive even integer and S k be the space of cusp forms of weight
More informationSOME REMARKS ON THE RESNIKOFF-SALDAÑA CONJECTURE
SOME REMARKS ON THE RESNIKOFF-SALDAÑA CONJECTURE SOUMYA DAS AND WINFRIED KOHNEN Abstract. We give some (weak) evidence towards the Resnikoff-Saldaña conjecture on the Fourier coefficients of a degree 2
More informationResults of modern sieve methods in prime number theory and more
Results of modern sieve methods in prime number theory and more Karin Halupczok (WWU Münster) EWM-Conference 2012, Universität Bielefeld, 12 November 2012 1 Basic ideas of sieve theory 2 Classical applications
More informationarxiv: v3 [math.nt] 28 Jul 2012
SOME REMARKS ON RANKIN-COHEN BRACKETS OF EIGENFORMS arxiv:1111.2431v3 [math.nt] 28 Jul 2012 JABAN MEHER Abstract. We investigate the cases for which products of two quasimodular or nearly holomorphic eigenforms
More informationLecture 12 : Hecke Operators and Hecke theory
Math 726: L-functions and modular forms Fall 2011 Lecture 12 : Hecke Operators and Hecke theory Instructor: Henri Darmon Notes written by: Celine Maistret Recall that we found a formula for multiplication
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 informationHORIZONTAL VS. VERTICAL SATO/TATE (OR VERTICAL VS. HORIZONTAL SATO/TATE?) Princeton, Dec. 12, 2003
HORIZONTAL VS. VERTICAL SATO/TATE (OR VERTICAL VS. HORIZONTAL SATO/TATE?) PHILIPPE MICHEL UNIV. MONTPELLIER II & INSTITUT UNIVERSITAIRE DE FRANCE Princeton, Dec. 12, 2003 1. KLOOSTERMAN SUMS Given 3 integers
More informationPETERSSON AND KUZNETSOV TRACE FORMULAS
PETERSSON AND KUZNETSOV TRACE FORMUAS JIANYA IU AND YANGBO YE In memory of Professor Armand Borel With whom we worked together At the University of Hong Kong over a three-year period This article is an
More informationQUADRATIC CONGRUENCES FOR COHEN - EISENSTEIN SERIES.
QUADRATIC CONGRUENCES FOR COHEN - EISENSTEIN SERIES. P. GUERZHOY The notion of quadratic congruences was introduced in the recently appeared paper [1]. In this note we present another, somewhat more conceptual
More informationSOME RECURRENCES FOR ARITHMETICAL FUNCTIONS. Ken Ono, Neville Robbins, Brad Wilson. Journal of the Indian Mathematical Society, 62, 1996, pages
SOME RECURRENCES FOR ARITHMETICAL FUNCTIONS Ken Ono, Neville Robbins, Brad Wilson Journal of the Indian Mathematical Society, 6, 1996, pages 9-50. Abstract. Euler proved the following recurrence for p(n),
More information2-ADIC PROPERTIES OF CERTAIN MODULAR FORMS AND THEIR APPLICATIONS TO ARITHMETIC FUNCTIONS
2-ADIC PROPERTIES OF CERTAIN MODULAR FORMS AND THEIR APPLICATIONS TO ARITHMETIC FUNCTIONS KEN ONO AND YUICHIRO TAGUCHI Abstract. It is a classical observation of Serre that the Hecke algebra acts locally
More informationCONGRUENCES FOR POWERS OF THE PARTITION FUNCTION
CONGRUENCES FOR POWERS OF THE PARTITION FUNCTION MADELINE LOCUS AND IAN WAGNER Abstract. Let p tn denote the number of partitions of n into t colors. In analogy with Ramanujan s work on the partition function,
More informationOn the low-lying zeros of elliptic curve L-functions
On the low-lying zeros of elliptic curve L-functions Joint Work with Stephan Baier Liangyi Zhao Nanyang Technological University Singapore The zeros of the Riemann zeta function The number of zeros ρ of
More informationRank-one Twists of a Certain Elliptic Curve
Rank-one Twists of a Certain Elliptic Curve V. Vatsal University of Toronto 100 St. George Street Toronto M5S 1A1, Canada vatsal@math.toronto.edu June 18, 1999 Abstract The purpose of this note is to give
More informationON THE FREQUENCY OF VANISHING OF QUADRATIC TWISTS OF MODULAR L-FUNCTIONS. J.B. Conrey J.P. Keating M.O. Rubinstein N.C. Snaith
ON THE FREQUENCY OF VANISHING OF QUADRATIC TWISTS OF MODULAR L-FUNCTIONS J.B. Conrey J.P. Keating M.O. Rubinstein N.C. Snaith ØÖ Øº We present theoretical and numerical evidence for a random matrix theoretical
More informationCusp forms and the Eichler-Shimura relation
Cusp forms and the Eichler-Shimura relation September 9, 2013 In the last lecture we observed that the family of modular curves X 0 (N) has a model over the rationals. In this lecture we use this fact
More informationRESEARCH STATEMENT OF LIANGYI ZHAO
RESEARCH STATEMENT OF LIANGYI ZHAO I. Research Overview My research interests mainly lie in analytic number theory and include mean-value type theorems, exponential and character sums, L-functions, elliptic
More informationAbstract. Gauss s hypergeometric function gives a modular parameterization of period integrals of elliptic curves in Legendre normal form
GAUSS S 2 F HYPERGEOMETRIC FUNCTION AND THE CONGRUENT NUMBER ELLIPTIC CURVE AHMAD EL-GUINDY AND KEN ONO Abstract Gauss s hypergeometric function gives a modular parameterization of period integrals of
More informationOn congruences for the coefficients of modular forms and some applications. Kevin Lee James. B.S. The University of Georgia, 1991
On congruences for the coefficients of modular forms and some applications by Kevin Lee James B.S. The University of Georgia, 1991 A Dissertation Submitted to the Graduate Faculty of The University of
More information