On unstabilzed genus three critical Heegaard surfaces

Details On unstabilzed genus three critical Heegaard surfaces On unstabilzed genus three critical Heegaard surfaces

2012-03-25

arxiv.org/abs/1203.5487v1

Mathematics

Geometric Topology

23 pages, 14 figures

Scientific paper

Let $M$ be a compact orientable irreducible 3-manifold and $H$ be an unstabilized genus three Heegaard splitting of $M$. In this article, we will define a simplicial complex of weak reducing pairs for $H$ and find several properties of this complex. Using this method, we will prove that an unstabilized Heegaard splitting of genus three is critical in a certain condition. In addition, we will show that the standard genus three Heegaard splitting for $T^3$ and the induced Heegaard splitting of the three component chain exterior by a certain tunnel system are critical as examples of the main theorem.

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