Irreducible graphs—Part 2
نویسندگان
چکیده
منابع مشابه
R 2 -irreducible Universal Covering Spaces of P 2 -irreducible Open 3-manifolds
An irreducible open 3-manifold W is R 2-irreducible if it contains no non-trivial planes, i.e. given any proper embedded plane in W some component of W ? must have closure an embedded halfspace R 2 0; 1). In this paper it is shown that if M is a connected, P 2-irreducible, open 3-manifold such that 1 (M) is nitely generated and the universal covering space f M of M is R 2-irreducible, then eith...
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ژورنال
عنوان ژورنال: Journal of Combinatorial Theory, Series B
سال: 1973
ISSN: 0095-8956
DOI: 10.1016/s0095-8956(73)80004-8