Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On G-sets and Isospectrality   We study finite G-sets and their tensor product with Riemannian manifolds,
and obtain results on isospectral quotients and covers. In particular, we show
the following: if M is a compact connected Riemannian manifold (or orbifold)
whose fundamental group has a finite non-cyclic quotient, then M has
isospectral non-isometric covers.

17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio