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Apr 13, 2017 at 12:58 history edited CommunityBot
replaced http://mathoverflow.net/ with https://mathoverflow.net/
Apr 13, 2017 at 12:19 history edited CommunityBot
replaced http://math.stackexchange.com/ with https://math.stackexchange.com/
Nov 8, 2016 at 18:29 comment added Joonas Ilmavirta I updated my answer to discuss the existence of a metric which is as smooth as possible.
Aug 24, 2015 at 11:14 comment added Robert Bryant You probably know this, but, just in case: It is more reasonable to ask that the square of the metric be smooth (or, more generally, that $F(d):M\times M\to\mathbb{R}$ be smooth, where $F:[0,\infty)\to[0,\infty)$ is a strictly increasing function satisfying certain other properties). This turns out to be just as good for most purposes (for example, in information geometry) and, for many purposes, is much better than asking that $d$ itself be smooth.
Aug 20, 2015 at 11:01 vote accept Asaf Shachar
Aug 20, 2015 at 11:00 history edited Asaf Shachar CC BY-SA 3.0
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Aug 19, 2015 at 16:40 history edited Joonas Ilmavirta CC BY-SA 3.0
Added tags.
Aug 19, 2015 at 16:38 answer added Joonas Ilmavirta timeline score: 50
Aug 19, 2015 at 15:17 history asked Asaf Shachar CC BY-SA 3.0