Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recursion Rules for Scattering Amplitudes in Non-Abelian Gauge Theories   We present a functional derivation of recursion rules for scattering
amplitudes in a non-Abelian gauge theory in a form valid to arbitrary loop
order. The tree-level and one-loop recursion rules are explicitly displayed.

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The categories of this paper are: q-bio
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The categories of this paper are: math
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The categories of this paper are: mtrl-th
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: astro-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: physics
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The categories of this paper are: comp-gas
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The categories of this paper are: chao-dyn