Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On singular Fano varieties with a divisor of Picard number one   In this paper we study the geometry of mildly singular Fano varieties on
which there is an effective prime divisor of Picard number one. Afterwards, we
address the case of toric varieties. Finally, we treat the lifting of extremal
contractions to universal covering spaces in codimension 1.

6
The categories of this paper are: astro-ph
37
The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
9
The categories of this paper are: nlin
0
The categories of this paper are: hep-ph
7
The categories of this paper are: hep-th
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
22
The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol