Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Enumeration of 0/1-matrices avoiding some 2x2 matrices   We enumerate the number of 0/1-matrices avoiding 2x2 submatrices satisfying
certain conditions. We also provide corresponding exponential generating
functions.

20
The categories of this paper are: acc-phys
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
21
The categories of this paper are: adap-org
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
1
The categories of this paper are: cs
19
The categories of this paper are: eess
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat