An Open Collar Theorem for 4-manifolds
نویسندگان
چکیده
Let M4 be an open 4-manifold with boundary. Conditions are given under which M4 is homeomorphic to <9Afx[0, 1). Applications include a 4-dimensional weak /¡-cobordism theorem and a classification of weakly flat embeddings of 2-spheres in 5"*. Specific examples of (n-2)-spheres embedded in S" (including n = 4) are also discussed.
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تاریخ انتشار 2009