Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Polcovar: Software for Computing the Mean and Variance of Subgraph
  Counts in Random Graphs   The mean and variance of the number of appearances of a given subgraph $H$ in
an Erd\H{o}s--R\'enyi random graph over $n$ nodes are rational polynomials in
$n$. We present a piece of software named Polcovar (from "polynomial" and
"covariance") that computes the exact rational coefficients of these
polynomials in function of $H$.

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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: acc-phys
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The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: supr-con
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The categories of this paper are: cond-mat
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The categories of this paper are: physics
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The categories of this paper are: math-ph