Timeline for Classification problem for non-compact manifolds
Current License: CC BY-SA 2.5
3 events
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| Nov 4, 2009 at 23:35 | comment | added | HJRW | I don't know about E8xR, but crossing with R sometimes makes things better. For instance, the Cannon-Edwards Theorem asserts that the double suspension of a homology sphere is homeomorphic to a sphere. It follows that although the cone C on a homology sphere is not a manifold, Cx(R^2) is a manifold, remarkably. On the the other hand, this gives a way of building "bad" triangulations of manifolds. | |
| Nov 4, 2009 at 23:06 | history | edited | Harrison Brown | CC BY-SA 2.5 |
added 473 characters in body
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| Nov 4, 2009 at 22:49 | history | answered | Harrison Brown | CC BY-SA 2.5 |