Rational homology spheres and four-ball genus
arXiv:math/0308073
Abstract
Using the Heegaard Floer homology of Ozsvath and Szabo we investigate obstructions to definite intersection pairings bounded by rational homology spheres. As an application we obtain new lower bounds for the four-ball genus of Montesinos links.
21 pages, 4 figures (xypic)