Quantum Modularity of Mock Theta Functions from the Alpha Hierarchy

This is Part 2 of [1]. We study the radial limits of the mock theta functions M_k(τ) constructed from the alpha hierarchy introduced in [1]. For k=1 we compute these limits numerically at roots of unity and show they satisfy quantum modular transformation properties in the sense of Zagier. The difference L_1(-1)-L_1(1) is observed to equal π²/30 - i/144 plus higher terms involving π⁴, π⁶ and odd zeta values ζ(3), ζ(5), ζ(7), ... with rational coefficients matching those of the Lambda functions Λ_k from [1]. This provides numerical evidence that the functions M_k(τ) give rise to quantum modular forms whose special values involve π² and odd zeta values in a structured way. Conjectures are stated for general k. [1] Hussain, M.R. (2026). Alpha Functions: A New Hierarchy with Connections to Elliptic Integrals and Mock Theta Functions. Zenodo. DOI:10.5281/zenodo.19025728

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Publication Details

Journal
Zenodo (CERN European Organization for Nuclear Research)
Published
2026-03-15
DOI
https://doi.org/10.5281/zenodo.19038843
Primary Topic
Advanced Mathematical Identities
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article
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article

Quantum Modularity of Mock Theta Functions from the Alpha Hierarchy

Muzzamal Hussain
Zenodo (CERN European Organization for Nuclear Research)
Advanced Mathematical Identities
article

Quantum Modularity of Mock Theta Functions from the Alpha Hierarchy

Muzzamal Hussain
article en

Abstract

This is Part 2 of [1]. We study the radial limits of the mock theta functions M_k(τ) constructed from the alpha hierarchy introduced in [1]. For k=1 we compute these limits numerically at roots of unity and show they satisfy quantum modular transformation properties in the sense of Zagier. The difference L_1(-1)-L_1(1) is observed to equal π²/30 - i/144 plus higher terms involving π⁴, π⁶ and odd zeta values ζ(3), ζ(5), ζ(7), ... with rational coefficients matching those of the Lambda functions Λ_k from [1]. This provides numerical evidence that the functions M_k(τ) give rise to quantum modular forms whose special values involve π² and odd zeta values in a structured way. Conjectures are stated for general k. [1] Hussain, M.R. (2026). Alpha Functions: A New Hierarchy with Connections to Elliptic Integrals and Mock Theta Functions. Zenodo. DOI:10.5281/zenodo.19025728

Zenodo (CERN European Organization for Nuclear Research)
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Advanced Mathematical Identities
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