A combinatorial description of the U^2=0 version of Heegaard Floer homology

Ozsváth, Péter S. and Stipsicz, András I. and Szabó, Zoltán (2011) A combinatorial description of the U^2=0 version of Heegaard Floer homology. INTERNATIONAL MATHEMATICS RESEARCH NOTICES (23). pp. 5412-5448. ISSN 1073-7928

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Abstract

We show that every 3–manifold admits a Heegaard diagram in which a truncated version of Heegaard Floer homology (when the holomorpic disks pass through the basepoints at most once) can be computed combinatorially.

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