Infinite cyclic normal subgroups of fundamental groups of noncompact 3-manifolds

Winters, Bobby Neal

doi:10.1090/S0002-9939-1994-1231306-1

Infinite cyclic normal subgroups of fundamental groups of noncompact $3$-manifolds
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Proc. Amer. Math. Soc. 120 (1994), 959-963 Request permission

Abstract:

It is shown that an end-irreducible $3$-manifold each of whose boundary components is compact and whose fundamental group contains an infinite cyclic normal subgroup is Seifert fibered.

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