Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Semi-invertible extensions of C*-algebras   We prolonge the list of C*-algebras for which all extensions by any stable
separable C*-algebra are semi-invertible. In particular, we handle certain
amalgamations, both of C*-algebras and of groups. Concerning groups we consider
both reduced and full group C*-algebras.

37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an