Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A remark on conformal $\SU(p,q)$-holonomy   If the conformal holonomy group $Hol(\mathcal{T})$ of a simply connected
space with conformal structure of signature $(2p-1,2q-1)$ is reduced to
$\U(p,q)$ then the conformal holonomy is already contained in the special
unitary group $\SU(p,q)$. We present two different proofs of this statement,
one using conformal tractor calculus and an alternative proof using Sparling's
characterisation of Fefferman metrics.

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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: chao-dyn
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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The categories of this paper are: supr-con
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The categories of this paper are: nucl-ex