Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Holomorphic projective connections on compact complex threefolds   We prove that a holomorphic projective connection on a complex projective
threefold is either flat, or it is a translation invariant holomorphic
projective connection on an abelian threefold. In the second case, a generic
translation invariant holomorphic affine connection on the abelian variety is
not projectively flat. We also prove that a simply connected compact complex
threefold with trivial canonical line bundle does not admit any holomorphic
projective connection.

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The categories of this paper are: cs
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: atom-ph
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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: q-bio
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-ex