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Feb 16, 2014 at 1:23 vote accept CommunityBot
Feb 16, 2014 at 1:23
Feb 15, 2014 at 15:00 comment added Noah Schweber HJRW: I didn't mention that because I didn't know about it - that's fascinating! Can you point me to a good source on it?
Feb 15, 2014 at 2:33 history made wiki Post Made Community Wiki by Todd Trimble
Feb 14, 2014 at 23:26 comment added François G. Dorais @HJRW: After I saw it, I was actually expecting you to give a (group theory focused) answer to this question!
Feb 14, 2014 at 22:08 comment added HJRW It seems a shame not to mention the ur-Nabutovsky--Weinberger theorem, I think actually due to Gromov, which uses the existence of groups with undecidable word problem to prove the existence of manifolds with infinitely many null-homotopic geodesics. Could there be a more surprising application of computability theory?
Feb 14, 2014 at 21:42 history answered Noah Schweber CC BY-SA 3.0