Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Construction of Exotic Smooth Structures   In this article, we construct infinitley many simply connected, nonsymplectic
and pairwise nondiffeomorphic 4-manifolds starting from E(n) and applying the
sequence of knot surgery, ordinary blowups and rational blowdown. We also
compute the Seiberg-Witten invariants of these manifolds.

28
The categories of this paper are: alg-geom
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The categories of this paper are: atom-ph
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The categories of this paper are: bayes-an
1
The categories of this paper are: cs
5
The categories of this paper are: gr-qc
3
The categories of this paper are: physics
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The categories of this paper are: plasm-ph
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The categories of this paper are: eess
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The categories of this paper are: math-ph
9
The categories of this paper are: nlin
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The categories of this paper are: econ
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The categories of this paper are: supr-con
4
The categories of this paper are: cond-mat
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The categories of this paper are: nucl-th
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The categories of this paper are: adap-org
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The categories of this paper are: solv-int