Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Homogeneous Lorentz manifolds with simple isometry group   Let H be a closed, noncompact subgroup of a simple Lie group G, such that G/H
admits an invariant Lorentz metric. We show that if G = SO(2,n), with n > 2,
then the identity component of H is conjugate to the identity component of
SO(1,n). Also, if G = SO(1,n), with n > 2, then the identity component of H is
conjugate to the identity component of SO(1,n-1).

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The categories of this paper are: supr-con
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The categories of this paper are: q-fin
9
The categories of this paper are: nlin
34
The categories of this paper are: chem-ph
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The categories of this paper are: eess
8
The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: econ
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The categories of this paper are: dg-ga
7
The categories of this paper are: hep-th
5
The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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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: atom-ph
12
The categories of this paper are: nucl-th