Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new approach to unramified descent in Bruhat-Tits theory   The purpose of the paper is to present an alternative approach to unramified
descent in Bruhat-Tits theory of reductive groups over nonarchimedean local
fields. This approach appears to be conceptually simpler than the approach in
the papers of Bruhat and Tits.

13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
3
The categories of this paper are: physics
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th