Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Deformation space of a non-uniform 3-dimensional real hyperbolic lattice
  in quaternionic hyperbolic plane   In this note, we study deformations of a non-uniform real hyperbolic lattice
in quaternionic hyperbolic spaces. Specially we show that the representations
of the fundamental group of the figure eight knot complement into PU(2,1)
cannot be deformed in $PSp(2,1)$ out of PU(2,1) up to conjugacy.

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The categories of this paper are: q-bio
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: nlin
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-ph
1
The categories of this paper are: cs
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The categories of this paper are: nucl-ex