Mathematics – Geometric Topology
Scientific paper
2002-01-14
Mathematics
Geometric Topology
13 pages 3 figures. Will appear in Topology and its Applications
Scientific paper
In this paper it is shown that manifolds admitting minimal genus weakly reducible but irreducible Heegaard splittings contain an essential surface. This is an extension of a well known theorem of Casson-Gordon to manifolds with non-empty boundary. The situation for non-minimal genus Heegaard splittings is also investigated and it is shown that boundary stabilizations are stabilizations for manifolds which are boundary primitive.
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