Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Self-Dual metrics on non-simply connected 4-manifolds   We construct self-dual(SD) but not locally conformally flat(LCF) metrics on
families of non-simply connected 4-manifolds with small signature. We construct
various sequences with bounded or unbounded Betti numbers and Euler
characteristic. These metrics have negative scalar curvature. As an
application, this addresses the Remark 4.79 of Besse.

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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
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The categories of this paper are: math-ph
7
The categories of this paper are: hep-th
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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: atom-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat