Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Morita-Rieffel Equivalence and Spectral Theory for Integrable
  Automorphism Groups of C*-Algebras   Given a C*-dynamical system (A,G,\alpha), we discuss conditions under which
subalgebras of the multiplier algebra M(A) consisting of fixed points for
\alpha are Morita-Rieffel equivalent to ideals in the crossed product of A by
G. In case G is abelian we also develop a spectral theory, giving a necessary
and sufficient condition for \alpha to be equivalent to the dual action on the
cross-sectional C*-algebra of a Fell bundle. In our main application we show
that a proper action of an abelian group on a locally compact space is
equivalent to a dual action.

19
The categories of this paper are: eess
1
The categories of this paper are: cs
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
15
The categories of this paper are: nucl-ex
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
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The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an