Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some examples of log Fano structures on blow-ups along subvarieties in
  products of two projective spaces   We consider the problem to determine which blow-ups along subvarieties in
products of two projective spaces are log Fano. By describing the nef cones of
such blow-ups with special centers, we give a partial classification result.
For each example, explicit boundary divisors are also given.

16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
21
The categories of this paper are: adap-org
18
The categories of this paper are: econ
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
32
The categories of this paper are: atom-ph