Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Partial Translation Algebras for Trees   In arXiv:math/0603621 we introduced the notion of a partial translation
$C^*$-algebra for a discrete metric space. Here we demonstrate that several
important classical $C^*$-algebras and extensions arise naturally by
considering partial translation algebras associated with subspaces of trees.

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The categories of this paper are: q-bio
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The categories of this paper are: cmp-lg
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The categories of this paper are: plasm-ph
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The categories of this paper are: stat
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The categories of this paper are: quant-ph
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-th
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The categories of this paper are: adap-org
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The categories of this paper are: mtrl-th
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The categories of this paper are: patt-sol
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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-lat