Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sums of class numbers and mixed mock modular forms   In this paper, we consider sums of class numbers of the type $\sum_{m\equiv
a\pmod{p}} H(4n-m^2)$, where $p$ is an odd prime, $n\in \mathbb{N},$ and $a\in
\mathbb{Z}$. By showing that these are coefficients of mixed mock modular
forms, we obtain explicit formulas. Using these formulas for $p=5$ and $7$, we
then prove a conjecture of Brown et al. in the case that $n=\ell$ is prime.

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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
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The categories of this paper are: gr-qc
0
The categories of this paper are: hep-ph
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The categories of this paper are: math-ph
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The categories of this paper are: adap-org
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: comp-gas