Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hepp's bound for Feynman graphs and matroids   We study a rational matroid invariant, obtained as the tropicalization of the
Feynman period integral. It equals the volume of the polar of the matroid
polytope and we give efficient formulas for its computation. This invariant is
proven to respect all known identities of Feynman integrals for graphs. We
observe a strong correlation between the tropical and transcendental integrals,
which yields a method to approximate unknown Feynman periods.

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The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: hep-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: quant-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: hep-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: adap-org
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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: dg-ga
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The categories of this paper are: chao-dyn