Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On pseudofunctors sending groups to 2-groups   For a category B with finite products, we first characterize pseudofunctors
from B to Cat whose corresponding opfibration is cartesian monoidal. Among
those, we then characterize the ones which extend to pseudofunctors from
internal groups to 2-groups. If B is additive, this is the case precisely when
the corresponding opfibration has groupoidal fibres.

11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc