2 problems

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Cohen's cusp-form conjecture for a generating series of Hurwitz class numbers
Cohen's conjecture. The coefficient of $X^{2n}$ in this expansion is a cusp form of weight $2n+2$ on $\Gamma_0(4)$ .
Conjecturesolvedgenerating-series hurwitz-class-numbers modular-formsarXiv posted 2 days ago
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The level Hurwitz class number identity for square indices
Let $M$ satisfy $2\leq M\leq 10$ or $M\in\{12,13,16,18,25\}$ , and let $N$ be a positive integer coprime to $M$ . Let $\delta_M(1,N)$ be the number defined in Theorem … . Level Hurwi…
Conjectureopenhurwitz-class-numbers modular-curves modular-formsarXiv posted 2 days ago

Cohen's cusp-form conjecture for a generating series of Hurwitz class numbers