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Nonseparating spheres and twisted Heegaard Floer homology

Yi Ni

Algebraic & Geometric Topology 13 (2013) 1143–1159
Abstract

If a 3–manifold Y contains a nonseparating sphere, then some twisted Heegaard Floer homology of Y is zero. This simple fact allows us to prove several results about Dehn surgery on knots in such manifolds. Similar results have been proved for knots in L–spaces.

Keywords
twisted Heegaard Floer homology, nonseparating sphere, Thurston norm, fibered knot, cosmetic surgery
Mathematical Subject Classification 2010
Primary: 57M27
Secondary: 57R58
References
Publication
Received: 1 September 2010
Accepted: 10 December 2012
Published: 17 April 2013
Authors
Yi Ni
Department of Mathematics, 253-37
California Institute of Technology
251 Sloan Hall
1200 E California Blvd
Pasadena, CA 91125
USA
http://www.its.caltech.edu/~yini/