Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Symbol Alphabets from Plabic Graphs   Symbol alphabets of n-particle amplitudes in N=4 super-Yang-Mills theory are
known to contain certain cluster variables of Gr(4,n) as well as certain
algebraic functions of cluster variables. In this paper we suggest an algorithm
for computing these symbol alphabets from plabic graphs by solving matrix
equations of the form C Z = 0 to associate functions on Gr(m,n) to
parameterizations of certain cells of Gr(k,n) indexed by plabic graphs. For m=4
and n=8 we show that this association precisely reproduces the 18 algebraic
symbol letters of the two-loop NMHV eight-point amplitude from four plabic
graphs.

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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
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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: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: stat
1
The categories of this paper are: cs
18
The categories of this paper are: econ