Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Batyrev type classification of $Q$--factorial projective toric
  varieties   The present paper is devoted to generalizing, inside the class of projective
toric varieties, the classification [Batyrev91], performed by Batyrev in 1991
for smooth complete toric varieties, to the singular $Q$--factorial case.
Moreover, in the first part of the paper the Kleinschmidt classification of
smooth complete toric varieties of Picard number 2 [Kleinschmidt] is revised.

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The categories of this paper are: plasm-ph
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The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: bayes-an
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
15
The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas