Strongly irreducible Heegaard splittings of hyperbolic 3-manifolds

preprint2020arXivOpen access

Abstract

Colding and Gabai have given an effective version of Li's theorem that non-Haken hyperbolic 3-manifolds have finitely many irreducible Heegaard splittings. As a corollary of their work, we show that Haken hyperbolic 3-manifolds have a finite collection of strongly irreducible Heegaard surfaces SiS_i and incompressible surfaces KjK_j such that any strongly irreducible Heegaard surface is a Haken sum Si+∑jnjKjS_i + \sum_j n_j K_j, up to one-sided associates of the Heegaard surfaces.

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