Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Quotients of trees for arithmetic subgroups of PGL2 over a rational
  function field   In this note we compute the fundamental domain of the action on the
corresponding Bruhat-Tits tree of the arithmetic subgroup of PGL2 with respect
to an arbitrary place of the rational function field.

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The categories of this paper are: mtrl-th
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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: physics
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-ex
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The categories of this paper are: cond-mat
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The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
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The categories of this paper are: cmp-lg
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The categories of this paper are: funct-an
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph