Nahm s conjecture about modularity of q-series
|
|
- Bernard Watts
- 5 years ago
- Views:
Transcription
1 (joint work with S. Zwegers) Oberwolfach July, 0
2 Let r and F A,B,C (q) = q nt An+n T B+C n (Z 0 ) r (q) n... (q) nr, q < where A M r (Q) positive definite, symmetric n B Q n, C Q, (q) n = ( q k ) k=
3 Let r and F A,B,C (q) = q nt An+n T B+C n (Z 0 ) r (q) n... (q) nr, q < where A M r (Q) positive definite, symmetric n B Q n, C Q, (q) n = ( q k ) k= Problem (Werner Nahm): for which triples of parameters (A, B, C) the function F A,B,C is a modular form?
4 the case r = Theorem(D. Zagier, M.Terhoeven, 007) All triples (A, B, C) in Q + Q Q for which F A,B,C is modular are given in the following table. A B C F A,B,C (e πiz ) 0 /60 θ 5, (z)/η(z) /60 θ 5, (z)/η(z) 0 /48 η(z) /η( z )η(z) / /4 η(z)/η(z) / /4 η(z)/η(z) / 0 /40 θ 5, ( z 4 )η(z)/η(z)η(4z) / /40 θ 5, ( z 4 )η(z)/η(z)η(4z) Here η(z) = q /4 n= ( q n ), θ 5,j (z) = ( ) [n/0] q n /40. n j (0)
5 Lemma. Let F (q) be a modular form of weight w for a subgroup of finite index Γ SL(, Z). Then when ε 0 ( ) F (e ε ) b ε w e a ε + o(ε N ) N 0 for appropriate numbers a, b C. Moreover, a π Q here.
6 Lemma. Let F (q) be a modular form of weight w for a subgroup of finite index Γ SL(, Z). Then when ε 0 ( ) F (e ε ) b ε w e a ε + o(ε N ) N 0 for appropriate numbers a, b C. Moreover, a π Q here. Strategy: compute the asymptotics of F A,B,C (e ε ) when ε 0.
7 Lemma. The system of equations r Q i = Q A ij j, i =,..., r j= has a unique solution with Q i (0, ) for all i r.
8 Lemma. The system of equations r Q i = Q A ij j, i =,..., r j= has a unique solution with Q i (0, ) for all i r. F A,B,C (q) = n a n (q) a n (q) = q nt An+n T B+C (q) n... (q) nr
9 Lemma. The system of equations r Q i = Q A ij j, i =,..., r j= has a unique solution with Q i (0, ) for all i r. F A,B,C (q) = n a n (q) Let q and n i so that q n i a n+ei (q) a n (q) = qnt Ae i + et i Ae i +e T i B a n (q) = q nt An+n T B+C (q) n... (q) nr Q i. Then q n QAi... Q A ir r =. i + Q i
10 Lemma. The system of equations r Q i = Q A ij j, i =,..., r j= has a unique solution with Q i (0, ) for all i r. F A,B,C (q) = n a n (q) Let q and n i so that q n i a n+ei (q) a n (q) = qnt Ae i + et i Ae i +e T i B a n (q) = q nt An+n T B+C (q) n... (q) nr Q i. Then q n QAi... Q A ir r =. i + Q i For fixed small ε terms a n (e ε ) are maximal around ( n log(q ),..., log(q r ) ). ε ε
11 Theorem. There is an asymptotic expansion F A,B,C (e ε ) βe α ε γε( + with the coefficients given as follows: α = r ( L() L(Qi ) ) > 0, i= β = det à / i c m ε m), ε 0 m= Q B i i ( Q i ) /, γ = C + + Qi, 4 Q i where L(x) = Li (x) + log(x) log( x) is the Rogers dilog, à = A + diag{ξ,..., ξ r }, ξ i = Q i Q i > 0
12 and c m = det Ã/ (π) r/ C m (B, ξ, t)e tt Ãt dt where C m are certain polynomials in 3r variables.
13 and c m = det Ã/ (π) r/ C m (B, ξ, t)e tt Ãt dt where C m are certain polynomials in 3r variables. Namely, we define polynomials in 3 variables D m Q[B, X, T ] by [ exp (B + Q Q )T ε/ m! B ( T ) m Li m ε / (Q) ε m ] m=3 = + ( Q D m B, Q, T ) ε m/. m= Then r C m (B, ξ, t) = D mi (B i, ξ i, t i ). m + +m r =m i=
14 Corollary. If F A,B,C is modular then its weight w = 0 α π Q r i= L(Q i) π Q e γε( + p= c pε p) = c p = γp p! p
15 Corollary. If F A,B,C is modular then its weight w = 0 α π Q r i= L(Q i) π Q e γε( + p= c pε p) = c p = γp p! p Since c m = det Ã/ (π) r/ C m (B, ξ, t)e tt Ãt dt are polynomials in the entries of B, ξ and Ã, we have infinitely many polynomial equations: ( cm m! cm )( B, ξ, Ã ) = 0, m =, 3,...
16 Back to the case r = : let c m (B, ξ, A) = (A + ξ) 3m[ c m m! cm ] (B, ξ, ), m =, 3,... A + ξ
17 Back to the case r = : let c m (B, ξ, A) = (A + ξ) 3m[ c m m! cm ] (B, ξ, ), m =, 3,... A + ξ Using Magma we have got the following decomposition of the radical of I = c, c 3, c 4, c 5 Q[B, ξ, A] into prime ideals Rad(I ) = P... P 4 where the generators of P i are given below:
18 i generators of P i ξ ξ + 3 B /, ξ +, A 4 B, ξ +, A 5 B, ξ +, A 6 B + /, ξ + 3ξ +, A + 7 B /, ξ + 3ξ +, A + 8 B + /, ξ, A 9 B, ξ, A 0 B /, ξ, A B, ξ ξ, A B, ξ ξ, A 3 B /, ξ + ξ, A / 4 B, ξ + ξ, A /
19 A B C F A,B,C (e πiz ) 0 /60 θ 5, (z)/η(z) /60 θ 5, (z)/η(z) 0 /48 η(z) /η( z )η(z) / /4 η(z)/η(z) / /4 η(z)/η(z) / 0 /40 θ 5, ( z 4 )η(z)/η(z)η(4z) / /40 θ 5, ( z 4 )η(z)/η(z)η(4z)
20 ( ) a a Theorem. Consider A =, a > a a, a. Then all pairs (B, C) such that F A,B,C is modular are: B C F A,B,C (e πiz ) ( ) b b ( ) b a 4 8a 4 ( ) ( a a ) a and a a 8 4 η(z) q an / n Z+ b a η(z) q an / n Z+ a η(z) q an / n Z+
21 Theorem. Modular ( functions F A,B,C (z) with the matrix A being a of the form a ) a a exist if and only if a =, a = 3/4 or a = /. Below is the list of all such modular functions. A B C F A,B,C (e πiz ) ( ) ( ) 0 0 ( ) ( ) 0 and (θ 5, 3 (z) + θ 5, 3 (z))η(z)/η(z)η(z/) θ 5, (z)η(z)/η(z) θ 5, (z)η(z)/η(z) +θ 5, 3 (z)θ 5, (z)η(z) 3 /η(z/) η(z) η(0z) ( 34 ) ( ) ( and ( ) ( ) 0 and 0 ( ) 0 ( ) ( ) ( ) 0 and 0 ( ) ) θ 5, ( z 8 )η(z)/η( z )η(z) θ 5, ( z 8 )η(z)/η( z )η(z) (θ 5, ( z 4 )η(z)/η(z)η(4z)) 0 θ 5, ( z 4 )θ 5,( z 4 )(η(z)/η(z)η(4z)) (θ 5, ( z 4 )η(z)/η(z)η(4z))
22 The Bloch group B(K) of a field K is defined as the quotient of the kernel of the map Z[K] Λ K [x] x ( x), [0], [] 0 by a subgroup generated by the elements of the form [x] + [y] + [ xy] + [ x ] [ y ] +. xy xy
23 The Bloch group B(K) of a field K is defined as the quotient of the kernel of the map Z[K] Λ K [x] x ( x), [0], [] 0 by a subgroup generated by the elements of the form [x] + [y] + [ xy] + [ x ] [ y ] +. xy xy If K is a number field then B(K) Z Q = K 3 (K) Z Q
24 The Bloch group B(K) of a field K is defined as the quotient of the kernel of the map Z[K] Λ K [x] x ( x), [0], [] 0 by a subgroup generated by the elements of the form [x] + [y] + [ xy] + [ x ] [ y ] +. xy xy If K is a number field then B(K) Z Q = K 3 (K) Z Q and the regulator map is given explicitly on B(K) by where B(K) R r [x] (D(σ (x)),..., D(σ r (x))) D(x) = I ( Li (x) + log( x) log x ) is the Bloch-Wigner dilogarithm function.
25 If Q i = r j= then [Q ] + + [Q r ] B(K): Q A ij j, i =,..., r
26 If Q i = r j= then [Q ] + + [Q r ] B(K): Q i ( Q i ) = i i Q A ij j, i =,..., r Q i j Q A ij j = i,j A ij Q i Q j = 0.
27 If Q i = r j= then [Q ] + + [Q r ] B(K): Q i ( Q i ) = i i Q A ij j, i =,..., r Q i j Q A ij j = i,j If F A,B,C is modular for some B, C then we must have L(Q ) + + L(Q r ) π Q for the distinguished solution with all Q i (0, ). A ij Q i Q j = 0.
28 Conjecture.(Werner Nahm) For a positive definite symmetric r r matrix with rational coefficients A the following are equivalent: There exist B Q r and C Q such that F A,B,C is a modular function. The element [Q ] + + [Q r ] is torsion in the corresponding Bloch group for every solution of Nahm s equation.
29 Conjecture.(Werner Nahm) For a positive definite symmetric r r matrix with rational coefficients A the following are equivalent: There exist B Q r and C Q such that F A,B,C is a modular function. The element [Q ] + + [Q r ] is torsion in the corresponding Bloch group for every solution of Nahm s equation. True when r = : one can prove that all solutions of Q = Q A are totally real if and only if A {,, }, and for the element [Q] the condition of being torsion is equivalent to being totally real since D(z) = 0 z R.
30 For A = hence ( ) a a all solutions are zero in the Bloch group: a a { Q = Q a Q a, Q = Q a Q a, ( Q Q ) a Q = =, Q Q Q ( Q )( Q ) = Q Q, Q + Q = [Q ] + [Q ] = 0 in B(C).
31 A counterexample to the conjecture: F 3/4 /4 /4 3/4, /4 /4, 80 but there are non-torsion solutions to { Q = Q 3/4 Q /4, Q = Q /4 Q 3/4. = θ 5,( z 8 )η(z) η( z )η(z)
32 A counterexample to the conjecture: F 3/4 /4 /4 3/4, /4 /4, 80 but there are non-torsion solutions to { Q = Q 3/4 Q /4, Q = Q /4 Q 3/4. Let t = Q /4 Q /4, then Q Q / Q Q / = θ 5,( z 8 )η(z) η( z )η(z) = t 3 Q / = t 3 ( Q ), = t 3 Q / = t 3 ( Q ). We substitute these equalities into Q / = t Q / and get
33 t 3 ( Q ) = t t 3 ( Q ), t 4 ( Q ) = Q = t 4 Q, t 4 =. Therefore all solutions are (Q, Q ) = (x, x) where or x = tx /, t 4 = ( x) 4 = x (x 3x + )(x x + ) = 0. Hence (Q, Q ) = ( + 3 not torsion because, + 3 D ( + 3) = ) [ is a solution, and + 3 ] is
34 Counterexample with integer entries: 3 0 A = , B =, C = 5, 0 0 F A,B,C (q) = η(z) θ 5, (z) η(z) 3.
35 Problem: find a correct formulation of Nahm s conjecture.
36 Problem: find a correct formulation of Nahm s conjecture. For a positive definite symmetric r r matrix with rational coefficients A the following are equivalent: There exist B Q r and C Q such that F A,B,C is a modular function. The element [Q ] + + [Q r ] is torsion in the corresponding Bloch group for EVERY (?) solution of Q i = r j= Q A ij j, i =,..., r.
Definitions, Theorems and Exercises. Abstract Algebra Math 332. Ethan D. Bloch
Definitions, Theorems and Exercises Abstract Algebra Math 332 Ethan D. Bloch December 26, 2013 ii Contents 1 Binary Operations 3 1.1 Binary Operations............................... 4 1.2 Isomorphic Binary
More informationHyperbolic volumes and zeta values An introduction
Hyperbolic volumes and zeta values An introduction Matilde N. Laĺın University of Alberta mlalin@math.ulberta.ca http://www.math.ualberta.ca/~mlalin Annual North/South Dialogue in Mathematics University
More informationREPRESENTATIONS OF INTEGERS AS SUMS OF SQUARES. Ken Ono. Dedicated to the memory of Robert Rankin.
REPRESENTATIONS OF INTEGERS AS SUMS OF SQUARES Ken Ono Dedicated to the memory of Robert Rankin.. Introduction and Statement of Results. If s is a positive integer, then let rs; n denote the number of
More informationPolylogarithms and Hyperbolic volumes Matilde N. Laĺın
Polylogarithms and Hyperbolic volumes Matilde N. Laĺın University of British Columbia and PIMS, Max-Planck-Institut für Mathematik, University of Alberta mlalin@math.ubc.ca http://www.math.ubc.ca/~mlalin
More informationLinear Mahler Measures and Double L-values of Modular Forms
Linear Mahler Measures and Double L-values of Modular Forms Masha Vlasenko (Trinity College Dublin), Evgeny Shinder (MPIM Bonn) Cologne March 1, 2012 The Mahler measure of a Laurent polynomial is defined
More informationFeynman Integrals, Regulators and Elliptic Polylogarithms
Feynman Integrals, Regulators and Elliptic Polylogarithms Pierre Vanhove Automorphic Forms, Lie Algebras and String Theory March 5, 2014 based on [arxiv:1309.5865] and work in progress Spencer Bloch, Matt
More informationUnderstanding hard cases in the general class group algorithm
Understanding hard cases in the general class group algorithm Makoto Suwama Supervisor: Dr. Steve Donnelly The University of Sydney February 2014 1 Introduction This report has studied the general class
More informationTHOMAS A. HULSE, CHAN IEONG KUAN, DAVID LOWRY-DUDA, AND ALEXANDER WALKER
A SHIFTED SUM FOR THE CONGRUENT NUMBER PROBLEM arxiv:1804.02570v2 [math.nt] 11 Apr 2018 THOMAS A. HULSE, CHAN IEONG KUAN, DAVID LOWRY-DUDA, AND ALEXANDER WALKER Abstract. We introduce a shifted convolution
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 informationAlgebra Homework, Edition 2 9 September 2010
Algebra Homework, Edition 2 9 September 2010 Problem 6. (1) Let I and J be ideals of a commutative ring R with I + J = R. Prove that IJ = I J. (2) Let I, J, and K be ideals of a principal ideal domain.
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 informationMahler s measure : proof of two conjectured formulae
An. Şt. Univ. Ovidius Constanţa Vol. 6(2), 2008, 27 36 Mahler s measure : proof of two conjectured formulae Nouressadat TOUAFEK Abstract In this note we prove the two formulae conjectured by D. W. Boyd
More informationThe Mahler measure of elliptic curves
The Mahler measure of elliptic curves Matilde Lalín (Université de Montréal) joint with Detchat Samart (University of Illinois at Urbana-Champaign) and Wadim Zudilin (University of Newcastle) mlalin@dms.umontreal.ca
More informationAN EXTENDED VERSION OF ADDITIVE K-THEORY
AN EXTENDED VERSION OF ADDITIVE K-THEORY STAVROS GAROUFALIDIS Abstract. There are two infinitesimal (i.e., additive) versions of the K-theory of a field F : one introduced by Cathelineau, which is an F
More informationMultiplicative Dedekind η-function and representations of finite groups
Journal de Théorie des Nombres de Bordeaux 17 (2005), 359 380 Multiplicative Dedekind η-function and representations of finite groups par Galina Valentinovna VOSKRESENSKAYA Résumé. Dans cet article, nous
More informationFrom the elliptic regulator to exotic relations
An. Şt. Univ. Ovidius Constanţa Vol. 16(), 008, 117 16 From the elliptic regulator to exotic relations Nouressadat TOUAFEK Abstract In this paper we prove an identity between the elliptic regulators of
More informationMahler measure of the A-polynomial
Mahler measure of the A-polynomial Abhijit Champanerkar University of South Alabama International Conference on Quantum Topology Institute of Mathematics, VAST Hanoi, Vietnam Aug 6-12, 2007 Outline History
More informationTorsion subgroups of rational elliptic curves over the compositum of all cubic fields
Torsion subgroups of rational elliptic curves over the compositum of all cubic fields Andrew V. Sutherland Massachusetts Institute of Technology April 7, 2016 joint work with Harris B. Daniels, Álvaro
More informationFinite-dimensional spaces. C n is the space of n-tuples x = (x 1,..., x n ) of complex numbers. It is a Hilbert space with the inner product
Chapter 4 Hilbert Spaces 4.1 Inner Product Spaces Inner Product Space. A complex vector space E is called an inner product space (or a pre-hilbert space, or a unitary space) if there is a mapping (, )
More informationarxiv: v1 [math.nt] 15 Mar 2012
ON ZAGIER S CONJECTURE FOR L(E, 2): A NUMBER FIELD EXAMPLE arxiv:1203.3429v1 [math.nt] 15 Mar 2012 JEFFREY STOPPLE ABSTRACT. We work out an example, for a CM elliptic curve E defined over a real quadratic
More informationTHE VOLUME OF A HYPERBOLIC 3-MANIFOLD WITH BETTI NUMBER 2. Marc Culler and Peter B. Shalen. University of Illinois at Chicago
THE VOLUME OF A HYPERBOLIC -MANIFOLD WITH BETTI NUMBER 2 Marc Culler and Peter B. Shalen University of Illinois at Chicago Abstract. If M is a closed orientable hyperbolic -manifold with first Betti number
More informationSymmetries, Fields and Particles 2013 Solutions
Symmetries, Fields and Particles 013 Solutions Yichen Shi Easter 014 1. (a) Define the groups SU() and SO(3), and find their Lie algebras. Show that these Lie algebras, including their bracket structure,
More informationThe Arithmetic of Elliptic Curves
The Arithmetic of Elliptic Curves Sungkon Chang The Anne and Sigmund Hudson Mathematics and Computing Luncheon Colloquium Series OUTLINE Elliptic Curves as Diophantine Equations Group Laws and Mordell-Weil
More information1 Directional Derivatives and Differentiability
Wednesday, January 18, 2012 1 Directional Derivatives and Differentiability Let E R N, let f : E R and let x 0 E. Given a direction v R N, let L be the line through x 0 in the direction v, that is, L :=
More informationUpper Bounds for Partitions into k-th Powers Elementary Methods
Int. J. Contemp. Math. Sciences, Vol. 4, 2009, no. 9, 433-438 Upper Bounds for Partitions into -th Powers Elementary Methods Rafael Jaimczu División Matemática, Universidad Nacional de Luján Buenos Aires,
More information2. THE EUCLIDEAN ALGORITHM More ring essentials
2. THE EUCLIDEAN ALGORITHM More ring essentials In this chapter: rings R commutative with 1. An element b R divides a R, or b is a divisor of a, or a is divisible by b, or a is a multiple of b, if there
More informationLecture 4. Frits Beukers. Arithmetic of values of E- and G-function. Lecture 4 E- and G-functions 1 / 27
Lecture 4 Frits Beukers Arithmetic of values of E- and G-function Lecture 4 E- and G-functions 1 / 27 Two theorems Theorem, G.Chudnovsky 1984 The minimal differential equation of a G-function is Fuchsian.
More informationMahler measure and special values of L-functions
Mahler measure and special values of L-functions Matilde N. Laĺın University of Alberta mlalin@math.ualberta.ca http://www.math.ualberta.ca/~mlalin October 24, 2008 Matilde N. Laĺın (U of A) Mahler measure
More informationA conjecture on the alphabet size needed to produce all correlation classes of pairs of words
A conjecture on the alphabet size needed to produce all correlation classes of pairs of words Paul Leopardi Thanks: Jörg Arndt, Michael Barnsley, Richard Brent, Sylvain Forêt, Judy-anne Osborn. Mathematical
More informationAN INTRODUCTION TO ARITHMETIC AND RIEMANN SURFACE. We describe points on the unit circle with coordinate satisfying
AN INTRODUCTION TO ARITHMETIC AND RIEMANN SURFACE 1. RATIONAL POINTS ON CIRCLE We start by asking us: How many integers x, y, z) can satisfy x 2 + y 2 = z 2? Can we describe all of them? First we can divide
More informationRamanujan s first letter to Hardy: 5 + = 1 + e 2π 1 + e 4π 1 +
Ramanujan s first letter to Hardy: e 2π/ + + 1 = 1 + e 2π 2 2 1 + e 4π 1 + e π/ 1 e π = 2 2 1 + 1 + e 2π 1 + Hardy: [These formulas ] defeated me completely. I had never seen anything in the least like
More informationThe complexity of Diophantine equations
The complexity of Diophantine equations Colloquium McMaster University Hamilton, Ontario April 2005 The basic question A Diophantine equation is a polynomial equation f(x 1,..., x n ) = 0 with integer
More informationFOURIER COEFFICIENTS OF VECTOR-VALUED MODULAR FORMS OF DIMENSION 2
FOURIER COEFFICIENTS OF VECTOR-VALUED MODULAR FORMS OF DIMENSION 2 CAMERON FRANC AND GEOFFREY MASON Abstract. We prove the following Theorem. Suppose that F = (f 1, f 2 ) is a 2-dimensional vector-valued
More informationLogarithm and Dilogarithm
Logarithm and Dilogarithm Jürg Kramer and Anna-Maria von Pippich 1 The logarithm 1.1. A naive sequence. Following D. Zagier, we begin with the sequence of non-zero complex numbers determined by the requirement
More informationCHAPTER I. Rings. Definition A ring R is a set with two binary operations, addition + and
CHAPTER I Rings 1.1 Definitions and Examples Definition 1.1.1. A ring R is a set with two binary operations, addition + and multiplication satisfying the following conditions for all a, b, c in R : (i)
More informationConstruction of latin squares of prime order
Construction of latin squares of prime order Theorem. If p is prime, then there exist p 1 MOLS of order p. Construction: The elements in the latin square will be the elements of Z p, the integers modulo
More informationOn K2 T (E) for tempered elliptic curves
On K T 2 (E) for tempered elliptic curves Department of Mathematics, Nanjing University, China guoxj@nju.edu.cn hrqin@nju.edu.cn Janurary 19 2012 NTU 1. Preliminary and history K-theory of categories Let
More informationCover Page. The handle holds various files of this Leiden University dissertation
Cover Page The handle http://hdl.handle.net/1887/37019 holds various files of this Leiden University dissertation Author: Brau Avila, Julio Title: Galois representations of elliptic curves and abelian
More informationarxiv: v1 [math.nt] 7 Oct 2009
Congruences for the Number of Cubic Partitions Derived from Modular Forms arxiv:0910.1263v1 [math.nt] 7 Oct 2009 William Y.C. Chen 1 and Bernard L.S. Lin 2 Center for Combinatorics, LPMC-TJKLC Nankai University,
More informationTEST CODE: MIII (Objective type) 2010 SYLLABUS
TEST CODE: MIII (Objective type) 200 SYLLABUS Algebra Permutations and combinations. Binomial theorem. Theory of equations. Inequalities. Complex numbers and De Moivre s theorem. Elementary set theory.
More informationPrimes of the Form x 2 + ny 2
Primes of the Form x 2 + ny 2 Steven Charlton 28 November 2012 Outline 1 Motivating Examples 2 Quadratic Forms 3 Class Field Theory 4 Hilbert Class Field 5 Narrow Class Field 6 Cubic Forms 7 Modular Forms
More informationuniform distribution theory
Uniform Distribution Theory 0 205, no., 63 68 uniform distribution theory THE TAIL DISTRIBUTION OF THE SUM OF DIGITS OF PRIME NUMBERS Eric Naslund Dedicated to Professor Harald Niederreiter on the occasion
More informationThe Birch & Swinnerton-Dyer conjecture. Karl Rubin MSRI, January
The Birch & Swinnerton-Dyer conjecture Karl Rubin MSRI, January 18 2006 Outline Statement of the conjectures Definitions Results Methods Birch & Swinnerton-Dyer conjecture Suppose that A is an abelian
More informationPeriodic continued fractions and elliptic curves over quadratic fields arxiv: v2 [math.nt] 25 Nov 2014
Periodic continued fractions and elliptic curves over quadratic fields arxiv:1411.6174v2 [math.nt] 25 Nov 2014 Mohammad Sadek Abstract Let fx be a square free quartic polynomial defined over a quadratic
More informationLARGE DEVIATIONS OF TYPICAL LINEAR FUNCTIONALS ON A CONVEX BODY WITH UNCONDITIONAL BASIS. S. G. Bobkov and F. L. Nazarov. September 25, 2011
LARGE DEVIATIONS OF TYPICAL LINEAR FUNCTIONALS ON A CONVEX BODY WITH UNCONDITIONAL BASIS S. G. Bobkov and F. L. Nazarov September 25, 20 Abstract We study large deviations of linear functionals on an isotropic
More informationOn rational approximation of algebraic functions. Julius Borcea. Rikard Bøgvad & Boris Shapiro
On rational approximation of algebraic functions http://arxiv.org/abs/math.ca/0409353 Julius Borcea joint work with Rikard Bøgvad & Boris Shapiro 1. Padé approximation: short overview 2. A scheme of rational
More informationABC Triples in Families
Edray Herber Goins Department of Mathematics Purdue University September 30, 2010 Abstract Given three positive, relative prime integers A, B, and C such that the first two sum to the third i.e. A+B =
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 informationq-series IDENTITIES AND VALUES OF CERTAIN L-FUNCTIONS Appearing in the Duke Mathematical Journal.
q-series IDENTITIES AND VALUES OF CERTAIN L-FUNCTIONS George E. Andrews, Jorge Jiménez-Urroz and Ken Ono Appearing in the Duke Mathematical Journal.. Introduction and Statement of Results. As usual, define
More informationELEMENTARY LINEAR ALGEBRA
ELEMENTARY LINEAR ALGEBRA K R MATTHEWS DEPARTMENT OF MATHEMATICS UNIVERSITY OF QUEENSLAND First Printing, 99 Chapter LINEAR EQUATIONS Introduction to linear equations A linear equation in n unknowns x,
More informationSection II.1. Free Abelian Groups
II.1. Free Abelian Groups 1 Section II.1. Free Abelian Groups Note. This section and the next, are independent of the rest of this chapter. The primary use of the results of this chapter is in the proof
More information1 Linear transformations; the basics
Linear Algebra Fall 2013 Linear Transformations 1 Linear transformations; the basics Definition 1 Let V, W be vector spaces over the same field F. A linear transformation (also known as linear map, or
More informationTHE ARITHMETIC OF THE COEFFICIENTS OF HALF INTEGRAL WEIGHT EISENSTEIN SERIES. H(1, n)q n =
THE ARITHMETIC OF THE COEFFICIENTS OF HALF INTEGRAL WEIGHT EISENSTEIN SERIES ANTAL BALOG, WILLIAM J. MCGRAW AND KEN ONO 1. Introduction and Statement of Results If H( n) denotes the Hurwitz-Kronecer class
More informationTEST CODE: MMA (Objective type) 2015 SYLLABUS
TEST CODE: MMA (Objective type) 2015 SYLLABUS Analytical Reasoning Algebra Arithmetic, geometric and harmonic progression. Continued fractions. Elementary combinatorics: Permutations and combinations,
More informationIntegral points of a modular curve of level 11. by René Schoof and Nikos Tzanakis
June 23, 2011 Integral points of a modular curve of level 11 by René Schoof and Nikos Tzanakis Abstract. Using lower bounds for linear forms in elliptic logarithms we determine the integral points of the
More informationJean Bourgain Institute for Advanced Study Princeton, NJ 08540
Jean Bourgain Institute for Advanced Study Princeton, NJ 08540 1 ADDITIVE COMBINATORICS SUM-PRODUCT PHENOMENA Applications to: Exponential sums Expanders and spectral gaps Invariant measures Pseudo-randomness
More informationSimple groups and the classification of finite groups
Simple groups and the classification of finite groups 1 Finite groups of small order How can we describe all finite groups? Before we address this question, let s write down a list of all the finite groups
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 informationJanuary 2016 Qualifying Examination
January 2016 Qualifying Examination If you have any difficulty with the wording of the following problems please contact the supervisor immediately. All persons responsible for these problems, in principle,
More information5 Group theory. 5.1 Binary operations
5 Group theory This section is an introduction to abstract algebra. This is a very useful and important subject for those of you who will continue to study pure mathematics. 5.1 Binary operations 5.1.1
More informationEquations for Hilbert modular surfaces
Equations for Hilbert modular surfaces Abhinav Kumar MIT April 24, 2013 Introduction Outline of talk Elliptic curves, moduli spaces, abelian varieties 2/31 Introduction Outline of talk Elliptic curves,
More informationLINEAR EQUATIONS WITH UNKNOWNS FROM A MULTIPLICATIVE GROUP IN A FUNCTION FIELD. To Professor Wolfgang Schmidt on his 75th birthday
LINEAR EQUATIONS WITH UNKNOWNS FROM A MULTIPLICATIVE GROUP IN A FUNCTION FIELD JAN-HENDRIK EVERTSE AND UMBERTO ZANNIER To Professor Wolfgang Schmidt on his 75th birthday 1. Introduction Let K be a field
More informationDepartment of Mathematics, University of California, Berkeley
ALGORITHMIC GALOIS THEORY Hendrik W. Lenstra jr. Mathematisch Instituut, Universiteit Leiden Department of Mathematics, University of California, Berkeley K = field of characteristic zero, Ω = algebraically
More informationIDEAL CLASSES AND RELATIVE INTEGERS
IDEAL CLASSES AND RELATIVE INTEGERS KEITH CONRAD The ring of integers of a number field is free as a Z-module. It is a module not just over Z, but also over any intermediate ring of integers. That is,
More informationRational constants of monomial derivations
Rational constants of monomial derivations Andrzej Nowicki and Janusz Zieliński N. Copernicus University, Faculty of Mathematics and Computer Science Toruń, Poland Abstract We present some general properties
More informationMathematics for Cryptography
Mathematics for Cryptography Douglas R. Stinson David R. Cheriton School of Computer Science University of Waterloo Waterloo, Ontario, N2L 3G1, Canada March 15, 2016 1 Groups and Modular Arithmetic 1.1
More informationPolylogarithms and Double Scissors Congruence Groups
Polylogarithms and Double Scissors Congruence Groups for Gandalf and the Arithmetic Study Group Steven Charlton Abstract Polylogarithms are a class of special functions which have applications throughout
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 informationMath 2070BC Term 2 Weeks 1 13 Lecture Notes
Math 2070BC 2017 18 Term 2 Weeks 1 13 Lecture Notes Keywords: group operation multiplication associative identity element inverse commutative abelian group Special Linear Group order infinite order cyclic
More informationAlgebra Exam Topics. Updated August 2017
Algebra Exam Topics Updated August 2017 Starting Fall 2017, the Masters Algebra Exam will have 14 questions. Of these students will answer the first 8 questions from Topics 1, 2, and 3. They then have
More informationA Generating-Function Approach for Reciprocity Formulae of Dedekind-like Sums
A Generating-Function Approach for Reciprocity Formulae of Dedekind-like Sums Jordan Clark Morehouse College Stefan Klajbor University of Puerto Rico, Rio Piedras Chelsie Norton Valdosta State July 28,
More informationAn introduction to arithmetic groups. Lizhen Ji CMS, Zhejiang University Hangzhou , China & Dept of Math, Univ of Michigan Ann Arbor, MI 48109
An introduction to arithmetic groups Lizhen Ji CMS, Zhejiang University Hangzhou 310027, China & Dept of Math, Univ of Michigan Ann Arbor, MI 48109 June 27, 2006 Plan. 1. Examples of arithmetic groups
More informationHyperbolic volume, Mahler measure, and homology growth
Hyperbolic volume, Mahler measure, and homology growth Thang Le School of Mathematics Georgia Institute of Technology Columbia University, June 2009 Outline 1 Homology Growth and volume 2 Torsion and Determinant
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 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 informationEXERCISES IN MODULAR FORMS I (MATH 726) (2) Prove that a lattice L is integral if and only if its Gram matrix has integer coefficients.
EXERCISES IN MODULAR FORMS I (MATH 726) EYAL GOREN, MCGILL UNIVERSITY, FALL 2007 (1) We define a (full) lattice L in R n to be a discrete subgroup of R n that contains a basis for R n. Prove that L is
More informationSIMULTANEOUS RATIONAL APPROXIMATION VIA RICKERT S INTEGRALS
SIMULTAEOUS RATIOAL APPROXIMATIO VIA RICKERT S ITEGRALS SARADHA AD DIVYUM SHARMA Abstract Using Rickert s contour integrals, we give effective lower bounds for simultaneous rational approximations to numbers
More informationSHABNAM AKHTARI AND JEFFREY D. VAALER
ON THE HEIGHT OF SOLUTIONS TO NORM FORM EQUATIONS arxiv:1709.02485v2 [math.nt] 18 Feb 2018 SHABNAM AKHTARI AND JEFFREY D. VAALER Abstract. Let k be a number field. We consider norm form equations associated
More informationAddition sequences and numerical evaluation of modular forms
Addition sequences and numerical evaluation of modular forms Fredrik Johansson (INRIA Bordeaux) Joint work with Andreas Enge (INRIA Bordeaux) William Hart (TU Kaiserslautern) DK Statusseminar in Strobl,
More informationRational Equivariant Forms
CRM-CICMA-Concordia University Mai 1, 2011 Atkin s Memorial Lecture and Workshop This is joint work with Abdellah Sebbar. Notation Let us fix some notation: H := {z C; I(z) > 0}, H := H P 1 (Q), SL 2 (Z)
More informationCongruent Number Problem and Elliptic curves
Congruent Number Problem and Elliptic curves December 12, 2010 Contents 1 Congruent Number problem 2 1.1 1 is not a congruent number.................................. 2 2 Certain Elliptic Curves 4 3 Using
More informationChapter 1 : The language of mathematics.
MAT 200, Logic, Language and Proof, Fall 2015 Summary Chapter 1 : The language of mathematics. Definition. A proposition is a sentence which is either true or false. Truth table for the connective or :
More informationPh.D. Qualifying Exam: Algebra I
Ph.D. Qualifying Exam: Algebra I 1. Let F q be the finite field of order q. Let G = GL n (F q ), which is the group of n n invertible matrices with the entries in F q. Compute the order of the group G
More information(3) Let Y be a totally bounded subset of a metric space X. Then the closure Y of Y
() Consider A = { q Q : q 2 2} as a subset of the metric space (Q, d), where d(x, y) = x y. Then A is A) closed but not open in Q B) open but not closed in Q C) neither open nor closed in Q D) both open
More informationa 11 x 1 + a 12 x a 1n x n = b 1 a 21 x 1 + a 22 x a 2n x n = b 2.
Chapter 1 LINEAR EQUATIONS 11 Introduction to linear equations A linear equation in n unknowns x 1, x,, x n is an equation of the form a 1 x 1 + a x + + a n x n = b, where a 1, a,, a n, b are given real
More informationRamanujan s last prophecy: quantum modular forms
Ramanujan s last prophecy: quantum modular forms Ken Ono (Emory University) Introduction Death bed letter Dear Hardy, I am extremely sorry for not writing you a single letter up to now. I discovered very
More informationPractical conditions on Markov chains for weak convergence of tail empirical processes
Practical conditions on Markov chains for weak convergence of tail empirical processes Olivier Wintenberger University of Copenhagen and Paris VI Joint work with Rafa l Kulik and Philippe Soulier Toronto,
More informationPrimes of the Form x 2 + ny 2
Primes of the Form x 2 + ny 2 GandAlF Talk: Notes Steven Charlton 28 November 2012 1 Introduction On Christmas day 1640, Pierre de Fermat announced in a letter to Marin Mersenne his theorem on when a prime
More informationA Diophantine System and a Problem on Cubic Fields
International Mathematical Forum, Vol. 6, 2011, no. 3, 141-146 A Diophantine System and a Problem on Cubic Fields Paul D. Lee Department of Mathematics and Statistics University of British Columbia Okanagan
More information1. Partial Fraction Expansion All the polynomials in this note are assumed to be complex polynomials.
Partial Fraction Expansion All the polynomials in this note are assumed to be complex polynomials A rational function / is a quotient of two polynomials P, Q with 0 By Fundamental Theorem of algebra, =
More informationTranscendental Numbers and Hopf Algebras
Transcendental Numbers and Hopf Algebras Michel Waldschmidt Deutsch-Französischer Diskurs, Saarland University, July 4, 2003 1 Algebraic groups (commutative, linear, over Q) Exponential polynomials Transcendence
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 informationTHE NUMBER OF DIOPHANTINE QUINTUPLES. Yasutsugu Fujita College of Industrial Technology, Nihon University, Japan
GLASNIK MATEMATIČKI Vol. 45(65)(010), 15 9 THE NUMBER OF DIOPHANTINE QUINTUPLES Yasutsugu Fujita College of Industrial Technology, Nihon University, Japan Abstract. A set a 1,..., a m} of m distinct positive
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 informationCSL361 Problem set 4: Basic linear algebra
CSL361 Problem set 4: Basic linear algebra February 21, 2017 [Note:] If the numerical matrix computations turn out to be tedious, you may use the function rref in Matlab. 1 Row-reduced echelon matrices
More informationNATIONAL BOARD FOR HIGHER MATHEMATICS. M. A. and M.Sc. Scholarship Test. September 25, Time Allowed: 150 Minutes Maximum Marks: 30
NATIONAL BOARD FOR HIGHER MATHEMATICS M. A. and M.Sc. Scholarship Test September 25, 2010 Time Allowed: 150 Minutes Maximum Marks: 30 Please read, carefully, the instructions on the following page 1 INSTRUCTIONS
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 informationOn Rankin-Cohen Brackets of Eigenforms
On Rankin-Cohen Brackets of Eigenforms Dominic Lanphier and Ramin Takloo-Bighash July 2, 2003 1 Introduction Let f and g be two modular forms of weights k and l on a congruence subgroup Γ. The n th Rankin-Cohen
More informationNATIONAL BOARD FOR HIGHER MATHEMATICS. M. A. and M.Sc. Scholarship Test. September 17, Time Allowed: 150 Minutes Maximum Marks: 30
NATIONAL BOARD FOR HIGHER MATHEMATICS M. A. and M.Sc. Scholarship Test September 17, 2016 Time Allowed: 150 Minutes Maximum Marks: 30 Please read, carefully, the instructions that follow INSTRUCTIONS TO
More information