English

Congruences in fractional partition functions

Number Theory 2021-03-16 v3

Abstract

The coefficients of the generating function (q;q)α(q;q)^\alpha_\infty produce pα(n)p_\alpha(n) for αQ\alpha \in \mathbb{Q}. In particular, when α=1\alpha = -1, the partition function is obtained. Recently, Chan and Wang identified and proved congruences of the form pab(n+c)0(mod)p_{\frac{a}{b}}(\ell n + c)\equiv 0 \pmod{\ell} where \ell is a prime such that adb\ell \mid a -db for d{4,6,8,10,14,26}d \in \{4, 6, 8, 10, 14, 26\}. Expanding upon their work, we use the representation of powers of the Dedekind-eta functions in linear sums of Hecke eigenforms and their lacunarity to raise the power of the modulus to higher powers of \ell. In addition, we generate congruences for when d=2d=2 employing Hecke algebra.

Keywords

Cite

@article{arxiv.1908.03937,
  title  = {Congruences in fractional partition functions},
  author = {Yunseo Choi},
  journal= {arXiv preprint arXiv:1908.03937},
  year   = {2021}
}
R2 v1 2026-06-23T10:44:44.361Z