Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonsmoothable group actions on elliptic surfaces   Let G be a cyclic group of order 3, 5 or 7, and X=E(n) be the relatively
minimal elliptic surface with rational base. In this paper, we prove that under
certain conditions on n, there exists a locally linear G-action on X which is
nonsmoothable with respect to infinitely many smooth structures on X. This
extends the main result of our previous paper.

3
The categories of this paper are: physics
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
32
The categories of this paper are: atom-ph
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The categories of this paper are: stat
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The categories of this paper are: nlin
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The categories of this paper are: adap-org