Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Regular balanced Cayley maps on ${\rm PSL}(2,p)$   A {\it regular balanced Cayley map} (RBCM for short) on a finite group
$\Gamma$ is an embedding of a Cayley graph on $\Gamma$ into a surface, with
some special symmetric property. People have classified RBCM's for cyclic,
dihedral, generalized quaternion, dicyclic, and semi-dihedral groups. In this
paper we classify RBCM's on the group ${\rm PSL}(2,p)$ for each prime number
$p>3$.

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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: nlin
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The categories of this paper are: chem-ph
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The categories of this paper are: stat
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org
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The categories of this paper are: cs
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The categories of this paper are: physics
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci