Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Jorgensen's inequality for quaternionic hyperbolic n-space   Jorgensen's inequality gives a necessary condition for a non-elementary two
generator group of isometries of real hyperbolic 2-space to be discrete. We
give analogues of Jorgensen's inequality for non-elementary groups of
isometries of quaternionic hyperbolic n-space generated by two elements, one of
which is loxodromic.

18
The categories of this paper are: econ
19
The categories of this paper are: eess
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
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The categories of this paper are: solv-int
5
The categories of this paper are: gr-qc
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
3
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: bayes-an
13
The categories of this paper are: quant-ph
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The categories of this paper are: chem-ph