Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On left invariant CR structures on SU(2)   There is a well known one--parameter family of left invariant CR structures
on $SU(2)\cong S^3$. We show how purely algebraic methods can be used to
explicitly compute the canonical Cartan connections associated to these
structures and their curvatures. We also obtain explicit descriptions of
tractor bundles and tractor connections.

3
The categories of this paper are: physics
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The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-lat
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The categories of this paper are: stat
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The categories of this paper are: econ
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The categories of this paper are: gr-qc
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The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
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The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
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The categories of this paper are: acc-phys
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The categories of this paper are: cs
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The categories of this paper are: patt-sol