A combinatorial approach to surgery formulas in Heegaard Floer homology

Abstract

Using the combinatorial approach to Heegaard Floer homology, we obtain a relatively easy formula for computation of the groups HF(Y p / q(K), Z / 2Z), where Yp / q(K) is the threemanifold obtained by p / q-surgery on a knot K inside a homology sphere Y. © Copyright 2009 Mathematical Sciences Publishers.