Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Computing Ribbon Obstructions for Colored Knots   Kjuchukova's $\Xi_p$ invariant gives a ribbon obstruction for Fox $p$-colored
knots. The invariant is derived from dihedral branched covers of 4-manifolds,
and is needed to calculate the signatures of these covers, when singularities
on the branching sets are present. In this note, we give an algorithm for
evaluating $\Xi_p$ from a colored knot diagram, and compute a couple of
examples.

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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ex
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The categories of this paper are: q-bio
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The categories of this paper are: hep-th
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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: chem-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: stat