Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Stiefel-Whitney Classes and the Conormal Cycle of a Singular Variety   A geometric construction of Sullivan's Stiefel-Whitney homology classes of a
real analytic variety $X$ is given by means of the conormal cycle of an
embedding of $X$ in a smooth variety. We prove that the Stiefel-Whitney classes
define additive natural transformations from certain constructible functions to
homology. We also show that, for a complex analytic variety, these classes are
the mod 2 reductions of the Chern-MacPherson classes.

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The categories of this paper are: quant-ph
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The categories of this paper are: q-alg
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The categories of this paper are: atom-ph
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The categories of this paper are: mtrl-th
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: econ
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The categories of this paper are: hep-ph
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The categories of this paper are: nlin
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The categories of this paper are: gr-qc
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The categories of this paper are: alg-geom
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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: nucl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an