Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Primitivity of some full group C$^*$-algebras   We show that the full group C$^*$-algebra of the free product of two
nontrivial countable amenable discrete groups, where at least one of them has
more than two elements, is primitive. We also show that in many cases, this
C$^*$-algebra is antiliminary and has an uncountable family of pairwise
inequivalent, faithful irreducible representations.

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The categories of this paper are: funct-an
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The categories of this paper are: chem-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: bayes-an
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The categories of this paper are: cs
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The categories of this paper are: adap-org
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The categories of this paper are: cmp-lg
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The categories of this paper are: q-alg
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The categories of this paper are: quant-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: physics
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc
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The categories of this paper are: q-fin