Timeline for Maps inducing zero on homotopy groups but are not null-homotopic
Current License: CC BY-SA 3.0
5 events
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| May 27, 2015 at 23:26 | comment | added | Kevin Casto | You can also generalize this to the case where X is an $n$-manifold and a $K(G,1)$ (or even just having nonzero homotopy groups only up to $n-1$), and $X \to S^n$ is the map that collapses everything outside a Euclidean ball to a point. | |
| May 27, 2015 at 16:22 | history | edited | Dylan Thurston | CC BY-SA 3.0 |
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| Apr 4, 2010 at 4:11 | comment | added | Ying Zhang | Nice! So this will give us examples when X and Y are both manifolds:) | |
| Apr 4, 2010 at 4:03 | history | edited | Dylan Thurston | CC BY-SA 2.5 |
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| Apr 4, 2010 at 3:57 | history | answered | Dylan Thurston | CC BY-SA 2.5 |