Edges, Orbifolds, and Seiberg-Witten Theory
arXiv:1305.1960
Abstract
Seiberg-Witten theory is used to obtain new obstructions to the existence of Einstein metrics on 4-manifolds with conical singularities along an embedded surface. In the present article, the cone angle is required to be of the form 2(pi)/p, where p is a positive integer, but we conjecture that similar results will also hold in greater generality.
54 pages, two figures
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