Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Centralisers in Houghton's Groups   We study the centralisers of elements, finite subgroups and virtually cyclic
subgroups of Houghton's group Hn. We discuss various Bredon (co-)homological
finiteness conditions satisfied by Hn including the Bredon (co-)homological
dimension and Bredon-FPn conditions, which are analogs of the ordinary
co-homological dimension and FPn conditions respectively.

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The categories of this paper are: physics
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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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: astro-ph
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The categories of this paper are: stat
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The categories of this paper are: q-alg
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The categories of this paper are: nucl-ex
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The categories of this paper are: quant-ph
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The categories of this paper are: q-bio
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: solv-int