Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Characterizing Projective Spaces for Varieties with at Most Quotient
  Singularities   We generalize the well-known numerical criterion for projective spaces by
Cho, Miyaoka and Shepherd-Barron to varieties with at worst quotient
singularities. Let $X$ be a normal projective variety of dimension $n \geq 3$
with at most quotient singularities. Our result asserts that if $C \cdot (-K_X)
\geq n+1$ for every curve $C \subset X$, then $X \cong \PP^n$.

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The categories of this paper are: hep-ph
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The categories of this paper are: cs
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
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The categories of this paper are: eess