Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Double crossed products of locally compact quantum groups   For a matched pair of locally compact quantum groups, we construct the double
crossed product as a locally compact quantum group. This construction
generalizes Drinfeld's quantum double construction. We study C*-algebraic
properties of these double crossed products and several links between double
crossed products and bicrossed products. In an appendix, we study the
Radon-Nikodym derivative of a weight under a quantum group action, following
Yamanouchi and obtain, as a corollary, a new characterization of closed quantum
subgroups.

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The categories of this paper are: funct-an
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The categories of this paper are: ao-sci
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The categories of this paper are: chem-ph
3
The categories of this paper are: physics
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The categories of this paper are: hep-th
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-lat
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: cond-mat
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The categories of this paper are: gr-qc
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The categories of this paper are: nlin
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The categories of this paper are: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: cs