Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Signless laplacian characteristic polynomials of regular graph
  transformations   Let $G$ be a simple $r$-regular graph with $n$ vertices and $m$ vertices. We
give the signless Laplacian characteristic polynomials of $xyz$-transformations
$G^{xyz}$ of $G$ in terms of $n$, $m$, $r$ and the signless Laplacian spectrum
of $G$.

27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph