Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Divisors on Hurwitz spaces: an appendix to 'The cycle classes of
  divisorial Maroni loci'   The Maroni stratification on the Hurwitz space of degree $d$ covers of genus
$g$ has a stratum that is a divisor only if $d-1$ divides $g$. Here we
construct a stratification on the Hurwitz space that is analogous to the Maroni
stratification, but has a divisor for all pairs $(d,g)$ with $d \leq g$ with a
few exceptions and we calculate the divisor class of an extension of these
divisors to the compactified Hurwitz space.

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The categories of this paper are: gr-qc
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The categories of this paper are: solv-int
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: alg-geom
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The categories of this paper are: cmp-lg
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The categories of this paper are: econ
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: supr-con
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-ex