Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On diagonal quasi-free automorphisms of simple Cuntz-Krieger algebras   We show that an outer action of a finite abelian group on a simple
Cuntz-Krieger algebra is strongly approximately inner in the sense of Izumi if
the action is given by diagonal quasi-free automorphisms and the associated
matrix is aperiodic. This is achieved by an approximate cohomology
vanishing-type argument for the canonical shift restricted to the relative
commutant of the set of domain projections of the canonical generating
isometries in the fixed point algebra.

25
The categories of this paper are: patt-sol
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The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
23
The categories of this paper are: solv-int
1
The categories of this paper are: cs