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Heekyoung Hahn

Associate Research Professor of Mathematics
Mathematics
220 Physics, Durham, NC 27708

Selected Publications


Poles of triple product L-functions involving monomial representations

Journal Article INTERNATIONAL JOURNAL OF NUMBER THEORY · 2021 Full text Open Access Cite

On tensor third L-functions of automorphic representations of GLn(AF)

Journal Article Proceedings of the American Mathematical Society · January 1, 2016 Langlands’ beyond endoscopy proposal for establishing functoriality motivates interesting and concrete problems in the representation theory of algebraic groups. We study these problems in a setting related to the Langlands L-functions L(s, π, ⊗3), where π ... Full text Cite

A general simple relative trace formula

Journal Article Pacific Journal of Mathematics · January 1, 2015 In this paper we prove a relative trace formula for all pairs of connected algebraic groups H ≤ G × G, with G a reductive group and H the direct product of a reductive group and a unipotent group, given that the test function satisfies simplifying hypothes ... Full text Cite

Distribution of square-free values of sequences associated with elliptic curves

Journal Article Contemporary Mathematics · October 16, 2013 Cite

ALGEBRAIC CYCLES AND TATE CLASSES ON HILBERT MODULAR VARIETIES

Journal Article International Journal of Number Theory · 2013 Cite

A simple twisted relative trace formula

Journal Article Int. Math. Res. Not. · June 5, 2009 Link to item Cite

Eisenstein series associated with Gamma_0(2)

Journal Article Ramanujan J. · 2008 Cite

Convolution sums of some functions on divisors

Journal Article Rocky Mountain Journal of Mathematics · December 1, 2007 One of the main goals in this paper is to establish convolution sums of functions for the divisor sums σ̃s (n) = Σd/n (-1)d-1ds and σ̂ s = Σd/n(-l)(n/d)-1ds, for certain s, which were first defined by Glaisher. We first introduce three functions P(q), E(q), ... Full text Cite

On zeros of Eisenstein series for genus zero Fuchsian groups

Journal Article Proceedings of the American Mathematical Society · August 1, 2007 Let Γ ≤ SL2(ℝ) be a genus zero Fuchsian group of the first kind with ∞ as a cusp, and let EΓ2k be the holomorphic Eisenstein series of weight 2k on Γ that is nonvanishing at ∞ and vanishes at all the other cusps (provided that such an Eisenstein series exi ... Full text Cite

Ramanujan's Forty Identities for the Rogers-Ramanujan Functions

Book · 2007 When seeking proofs of Ramanujan's identities for the Rogers–Ramanujan functions, Watson, i.e., G. N. Watson, was not an “idiot.” He, L. J. ... functions. In this paper, for 35 of the 40 identities, we offer proofs that are in the spirit of Ramanuja ... Cite

Integrable systems and modular forms of level 2

Journal Article Journal of Physics A: Mathematical and General · December 15, 2006 A set of nonlinear differential equations associated with the Eisenstein series of the congruent subgroup Γ0(2) of the modular group SL2(ℤ) is constructed. These nonlinear equations are analogues of the well-known Ramanujan equations, as well as the Chazy ... Full text Cite

Septic analogues of the Rogers-Ramanujan functions

Journal Article Acta Arithmetica · January 1, 2003 Full text Cite

New Ramanujan-Kolberg type partition identities

Journal Article Mathematical Research Letters · January 1, 2002 In this article, we use functions studied by N. J. Fine and R. J. Evans to construct analogues of modular equations first discovered by S. Ramanujan. We then use these functions to construct new identities satisfied by Σn=0∞ p(ln+k)qn, with odd prime l and ... Full text Cite