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A torus reduction theorem for regular coverings of 3-manifolds by homology 3-spheres

Published online by Cambridge University Press:  24 October 2008

E. Luft
Affiliation:
Department of Mathematics, University of British Columbia, 121–1984 Mathematics Road, Vancouver, B.C., Canada, V6T 1Y4
D. Sjerve
Affiliation:
Department of Mathematics, University of British Columbia, 121–1984 Mathematics Road, Vancouver, B.C., Canada, V6T 1Y4

Abstract

For any regular covering p:MM of 3-dimensional manifolds M, M with M a homology 3-sphere we construct a regular covering p′: M′ → M′ of 3-manifolds M′, M′ with the same group of covering transformations and a degree 1 map f:MM′ so that M′ is a homology 3-sphere, M′ (and hence M′) is irreducible and does not contain incompressible tori, and the regular covering p:MM is induced from the regular covering p′: M′ → M′ by the map f. Assuming Thurston's geometrization conjecture it follows that M′ (and hence M′) is either hyperbolic or Seifert fibred.

Type
Research Article
Copyright
Copyright © Cambridge Philosophical Society 1991

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