Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The \'etale cohomology ring of a punctured arithmetic curve   We compute the cohomology ring $H^*(U,\mathbb{Z}/n\mathbb{Z})$ for
$U=X\setminus S$ where $X$ is the spectrum of the ring of integers of a number
field $K$ and $S$ is a finite set of finite primes.

34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
19
The categories of this paper are: eess
24
The categories of this paper are: dg-ga
3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
0
The categories of this paper are: hep-ph
16
The categories of this paper are: stat
21
The categories of this paper are: adap-org
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex