Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cellular covers of local groups   We prove that, in the category of groups, the composition of a
cellularization and a localization functor need not be idempotent. This
provides a negative answer to a question of Emmanuel Dror Farjoun.

19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
34
The categories of this paper are: chem-ph
10
The categories of this paper are: q-bio
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
0
The categories of this paper are: hep-ph
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas