Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Triangulation of 2-loop MHV Amplituhedron from Sign Flips   In this paper, we consider the triangulation of 2-loop MHV amplituhedron from
"sign flip" definition. Using the isomorphism between $m=2, k=2$ tree
amplituhedron and 1-loop MHV physical amplituhedron, we found the direct
triangulation of 2-loop MHV amplituhedron from sign flip. This triangulation is
different from the BCFW triangulation because of the structure of the cells.
And we also found a formula of the canonical form of $n$-point 2-loop MHV
amplituhedron. This formula looks like a 2-loop version of the Kermit
representation of 1-loop MHV amplitude. We checked that the sum of these cells
of direct triangulation and BCFW or double pentagon diagram, these are
consistent up to at least 22-pt amplitude numerically.

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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: hep-ph
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: q-bio
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The categories of this paper are: chao-dyn
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: math-ph
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The categories of this paper are: econ
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The categories of this paper are: patt-sol
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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: gr-qc
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The categories of this paper are: hep-lat