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Published online by Cambridge University Press: 24 October 2008
The purpose of this note is to construct a non-compact 3-manifold M with the following properties:
(i) M is orientable and irreducible
(ii) ∂M is connected and compact and its inclusion in M is a homotopy equivalence
(iii) M is not homeomorphic to ∂M × R+.
(Throughout this paper, all manifolds will be PL and all embeddings will be PL and locally flat.)