Fundamental groups, Γ-groups, and codimension two submanifolds
✍ Scribed by Sylvain E. Cappell; Julius L. Shaneson
- Book ID
- 112783610
- Publisher
- European Mathematical Society
- Year
- 1976
- Tongue
- English
- Weight
- 568 KB
- Volume
- 51
- Category
- Article
- ISSN
- 0010-2571
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📜 SIMILAR VOLUMES
A closed connected n-manifold N is called a codimension 2 fibrator (codimension 2 orientable fibrator, respectively) if each proper map p : M → B on an (orientable, respectively) (n+2)-manifold M each fiber of which is shape equivalent to N is an approximate fibration. Let r be a nonnegative integer
Every hopfian n-manifold N with hyperhopfian fundamental group is known to be a codimension-2 orientable fibrator. In this paper, we generalize to the non-orientable setting by considering the covering space N of N corresponding to H , where H is the intersection of all subgroups H i of index 2 in π
For a tree T of its height equal to or less than !1, we construct a space XT by attaching a circle to each node and connecting each node to its successors by intervals. H is the Hawaiian earring and H T 1 (X ) denotes a canonical factor of the ÿrst integral singular homology group. The following equ