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On $t$-core and self-conjugate $(2t-1)$-core partitions in arithmetic progressions (2005.07020v3)
Published 14 May 2020 in math.NT and math.CO
Abstract: We extend recent results of Ono and Raji, relating the number of self-conjugate $7$-core partitions to Hurwitz class numbers. Furthermore, we give a combinatorial explanation for the curious equality $2\operatorname{sc}_7(8n+1) = \operatorname{c}_4(7n+2)$. We also conjecture that an equality of this shape holds if and only if $t=4$, proving the cases $t\in{2,3,5}$ and giving partial results for $t>5$.