Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Amplituhedron BCFW Triangulation   The amplituhedron Ank4 is a geometric object, introduced by Arkani-Hamed and
Trnka (2013) in the study of scattering amplitudes in quantum field theories.
They conjecture that Ank4 admits a decomposition into images of BCFW positroid
cells, arising from the Britto--Cachazo--Feng--Witten recurrence (2005). We
prove that this conjecture is true.

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The categories of this paper are: nucl-ex
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The categories of this paper are: mtrl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: acc-phys
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The categories of this paper are: plasm-ph
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The categories of this paper are: nlin
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The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: funct-an
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The categories of this paper are: atom-ph
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The categories of this paper are: physics
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: stat