Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Crossed products and the Mackey-Rieffel-Green machine   We give an introduction into the ideal structure and representation theory of
crossed products by actions of locally compact groups on C*-algebras. In
particular, we discuss the Mackey-Rieffel-Green theory of induced
representations of crossed products and groups. Although we do not give
complete proofs of all results, we try at least to explain the main ideas. For
a more detailed exposition of many of the results presented here we refer to
the beautiful recent book by Dana Williams.

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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-th
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The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: bayes-an
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: econ
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The categories of this paper are: cond-mat
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The categories of this paper are: cs