Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A primer on computational group homology and cohomology   These are expanded lecture notes of a series of expository talks surveying
basic aspects of group cohomology and homology. They were written for someone
who has had a first course in graduate algebra but no background in cohomology.
You should know the definition of a (left) module over a (non-commutative)
ring, what $\zzz[G]$ is (where $G$ is a group written multiplicatively and
$\zzz$ denotes the integers), and some ring theory and group theory. However,
an attempt has been made to (a) keep the presentation as simple as possible,
(b) either provide an explicit reference of proof of everything.
  Several computer algebra packages are used to illustrate the computations,
though for various reasons we have focused on the free, open source packages
such as GAP and SAGE.

22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ