Abstract
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We give a short proof of Scharlemann’s strong Haken theorem for closed
–manifolds (and
manifolds with spherical boundary). As an application, we also show that given a decomposing
sphere
for a
–manifold
that splits off an
summand, any
Heegaard splitting of
restricts to the standard Heegaard splitting on the summand.
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Keywords
Heegaard splitting, Haken sphere, strong Haken theorem
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Mathematical Subject Classification
Primary: 57K30
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Publication
Received: 6 July 2022
Revised: 6 February 2023
Accepted: 20 June 2023
Published: 19 August 2024
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Publishers). Distributed under the Creative Commons
Attribution License 4.0 (CC BY). |
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