Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Comparison of two techniques for proving nonexistence of strongly
  regular graphs   We show that the method of counting closed walks in strongly regular graphs
rules out no parameter sets other than those ruled out by the method of
counting eigenvalue multiplicities.

8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
25
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
30
The categories of this paper are: q-alg
28
The categories of this paper are: alg-geom
18
The categories of this paper are: econ