Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Counting Signed Vexillary Permutations   We show that the number of signed permutations avoiding 1234 equals the
number of signed permutations avoiding 2143 (also called vexillary signed
permutations), resolving a conjecture by Anderson and Fulton. The main tool
that we use is the generating tree developed by West. Many further directions
are mentioned in the end.

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The categories of this paper are: funct-an
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The categories of this paper are: cs
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The categories of this paper are: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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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: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: econ
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The categories of this paper are: hep-ex