Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cyclic Branched Coverings of Brieskorn Spheres Bounding Acyclic
  4-Manifolds   We show that standard cyclic actions on Brieskorn homology 3-spheres with
non-empty fixed set do not extend smoothly to any contractible smooth
4-manifold it may bound. The quotient of any such extension would be an acyclic
$4$-manifold with boundary a related Brieskorn homology sphere. We briefly
discuss well known invariants of homology spheres that obstruct acyclic
bounding 4-manifolds, and then use a method based on equivariant Yang-Mills
moduli spaces to rule out extensions of the actions.

36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
28
The categories of this paper are: alg-geom
7
The categories of this paper are: hep-th
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex