Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The nullity of unicyclic signed graphs   In this paper we introduce the nullity of signed graphs, and give some
results on the nullity of signed graphs with pendant trees. We characterize the
unicyclic signed graphs of order n with nullity n-2; n-3; n-4; n-5
respectively.

30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
34
The categories of this paper are: chem-ph
25
The categories of this paper are: patt-sol
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
11
The categories of this paper are: hep-lat
37
The categories of this paper are: supr-con
20
The categories of this paper are: acc-phys
31
The categories of this paper are: ao-sci