Embedding 3-manifolds and smooth structu
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Fang Fuquan
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Article
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1997
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Elsevier Science
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English
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Let M be a noncompact 4-manifold with at least two open ends. Suppose that one of these ends is homeomorphic to N x iI& where N is an oriented 3-manifold satisfying one of the following conditions: (i) ~1 (N) is an extension of the free group by a perfect normal subgroup. (ii) HI (N) g Z/n, @. @ Z