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- 00:34, 30 August 2013 (diff | hist) Homotopy spheres II (Ex) (top)
- 00:33, 30 August 2013 (diff | hist) N Talk:Homotopy spheres II (Ex) (Created page with "<wikitex>; Exercise 3. Suppose that $f:\Sigma\times S^k\rightarrow S^n\times S^k$ is a diffeomorphism. Then $f|_{\Sigma\times\cdot}$ is an embedding of $\Sigma$ into $S^n\tim...") (top)