Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On $p$-adic colligations and 'rational maps' of Bruhat-Tits trees   Consider matrices of order $k+N$ over $p$-adic field determined up to
conjugations by elements of $GL$ over $p$-adic integers. We define a product of
such conjugacy classes and construct the analog of characteristic functions
(transfer functions), they are maps from Bruhat-Tits trees to Bruhat-Tits
buildings. We also examine categorical quotient for usual operator
colligations.

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The categories of this paper are: q-alg
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: q-fin
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The categories of this paper are: math-ph
6
The categories of this paper are: astro-ph
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The categories of this paper are: comp-gas
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The categories of this paper are: nlin
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The categories of this paper are: chem-ph
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The categories of this paper are: econ
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The categories of this paper are: cs
0
The categories of this paper are: hep-ph
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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: atom-ph
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The categories of this paper are: patt-sol