The odd-order radial limit of Ramanujan's third-order mock theta function

Read full text
Authors: Joesph Daniel Burke III
Cited by: 3

Abstract

We prove that for every odd integer k ≥ 3 and every primitive kth root of unity ζ_k, lim_{r→1⁻} f(rζ_k) = (4/3)·T_k, where T_k is a finite cyclotomic sum in ℤ[ζ_k]. This is the odd-order companion to the Folsom–Ono–Rhoades even-order radial limit formula. The factor 4/3 arises from the k-periodicity of the q-Pochhammer symbol on the unit circle: each complete cycle contributes a factor of 2, squaring in the denominator yields 4, and the resulting geometric series collapses to 4/3. "v4: Corrects v3, which was uploaded in error. This version restores the original odd-order radial limit theorem."

Fields of Study & Subjects

Advanced Mathematical Identities Advanced Combinatorial Mathematics Mathematical functions and polynomials

Publication details

Journal / source
Zenodo (CERN European Organization for Nuclear Research)
Publication date
15 May 2026
Language
EN
Document type
Preprint