Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Galois map for groupoid actions   Some conditions for the Galois map to be injective are given in the groupoid
acting on a noncommutative ring context. In the particular case in which the
Galois extension is a central Galois algebra, it is given a complete
characterization of that kind of extension with Galois map bijective.

32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
10
The categories of this paper are: q-bio
12
The categories of this paper are: nucl-th
17
The categories of this paper are: q-fin
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
23
The categories of this paper are: solv-int
20
The categories of this paper are: acc-phys