Heegaard Floer correction terms and rational genus bounds

Yi Ni; Zhongtao Wu

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arXiv · 1205.7053

Heegaard Floer correction terms and rational genus bounds

Yi Ni·Zhongtao Wu

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Abstract

Given an element in the first homology of a rational homology 3-sphere $Y$, one can consider the minimal rational genus of all knots in this homology class. This defines a function $Θ$ on $H_1(Y;\mathbb Z)$, which was introduced by Turaev as an analogue of Thurston norm. We will give a lower bound for this function using the correction terms in Heegaard Floer homology. As a corollary, we show that Floer simple knots in L-spaces are genus minimizers in their homology classes, hence answer questions of Turaev and Rasmussen about genus minimizers in lens spaces.

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Yi Ni, Zhongtao Wu. 2014-09-10. Heegaard Floer correction terms and rational genus bounds. https://arxiv.org/abs/1205.7053

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