Timeline for finite generated group realized as fundamental group of manifolds
Current License: CC BY-SA 2.5
6 events
| when toggle format | what | by | license | comment | |
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| Oct 19, 2017 at 12:17 | comment | added | HJRW | @MichaelAlbanese -- of course! Each time you do the gluing, you just have to make sure that the induced orientations on the copy of $S^1\times S^2$ that you're gluing along are compatible. | |
| Oct 18, 2017 at 15:01 | comment | added | Michael Albanese | @HJRW: Is the resulting four-manifold orientable? | |
| Apr 13, 2017 at 12:58 | history | edited | CommunityBot |
replaced http://mathoverflow.net/ with https://mathoverflow.net/
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| Aug 12, 2013 at 16:55 | comment | added | HJRW | @LeonLampret: van Kampen's theorem. | |
| Aug 12, 2013 at 16:43 | comment | added | Leo | Ok, we have $\pi_1(S^2\times D^2)=1$, so the loop $r_j$ has been killed. But how do you know that this surgery operation does not alter $\pi_1$ in any other way, i.e. adding/removing any other generators/relations? | |
| Feb 16, 2010 at 3:12 | history | answered | HJRW | CC BY-SA 2.5 |