Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reidemeister zeta functions of low-dimensional almost-crystallographic
  groups are rational   We prove that the Reidemeister zeta functions of automorphisms of
crystallographic groups with diagonal holonomy $\mathbb{Z}_2$ are rational. As
a result, we obtain that Reidemeister zeta functions of automorphisms of
almost-crystallographic groups up to dimension 3 are rational.

11
The categories of this paper are: hep-lat
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
12
The categories of this paper are: nucl-th
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
21
The categories of this paper are: adap-org
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas