Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Partial cohomology of groups and extensions of semilattices of abelian
  groups   We extend the notion of a partial cohomology group $H^n(G,A)$ to the case of
non-unital $A$ and find interpretations of $H^1(G,A)$ and $H^2(G,A)$ in the
theory of extensions of semilattices of abelian groups by groups.

36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci