Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Character varieties in SL_2 and Kauffman skein algebras   These lecture notes concern the algebraic geometry of the character variety
of a finitely generated group in SL(2,C) from the point of view of skein
modules. We focus on the case of surface and 3-manifolds groups and construct
the Reidemeister torsion as a rational volume form on the character variety.

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The categories of this paper are: gr-qc
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The categories of this paper are: comp-gas
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
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The categories of this paper are: cs
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The categories of this paper are: nlin