PreprintCC BY 4.0arXiv
An elementary approach to Sun Kim's general theta function identities
Abstract
Ramanujan's modular equations of degrees $3$, $5$, $7$, $11$ and $23$ are closely related to certain theta function identities. Warnaar generalized the identities arising from the modular equations of degrees $3$ and $7$ to a general theta function identity. Kim subsequently obtained a further general theta function identity associated with the modular equations of degrees $5$, $11$ and $23$, and established several general theta function identities containing known partition theorems as special cases. In this paper, we present an elementary approach to Kim's general theta function identities, yielding q-series proofs of these identities within a common framework.
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BibTeX
@misc{tang2026elementary,
title = {{An elementary approach to Sun Kim's general theta function identities}},
author = {Dazhao Tang},
howpublished = {arXiv},
year = {2026},
month = sep,
doi = {10.48550/arxiv.2609.09751},
eprint = {2609.09751},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.09751},
note = {CC BY 4.0},
}
RIS
TY - UNPB
TI - An elementary approach to Sun Kim's general theta function identities
AU - Dazhao Tang
PY - 2026
DA - 2026/09/09
PB - arXiv
DO - 10.48550/arxiv.2609.09751
UR - https://arxiv.org/abs/2609.09751
AB - Ramanujan's modular equations of degrees $3$, $5$, $7$, $11$ and $23$ are closely related to certain theta function identities. Warnaar generalized the identities arising from the modular equations of degrees $3$ and $7$ to a general theta function identity. Kim subsequently obtained a further general theta function identity associated with the modular equations of degrees $5$, $11$ and $23$, and established several general theta function identities containing known partition theorems as special cases. In this paper, we present an elementary approach to Kim's general theta function identities, yielding q-series proofs of these identities within a common framework.
ER -