A finiteness result for Heegaard splittings

Details A finiteness result for Heegaard splittings A finiteness result for Heegaard splittings

2002-11-18

arxiv.org/abs/math/0211273v1

Mathematics

Geometric Topology

25 pages, 8 figures

Scientific paper

In this paper we show that for a given 3-manifold and a given Heegaard splitting there are finitely many preferred decomposing systems of $3g - 3$ disjoint essential disks. These are characterized by a combinatorial criterion which is a slight strengthening of Casson-Gordon's rectangle condition. This is in contrast to fact that in general there can exist infinitely many such systems of disks which satisfy just the Casson-Gordon rectangle condition.

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