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Results tagged with metric-spaces
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user 74717
A metric space is a pair $(X,d)$, where $X$ is a set and $d:X \times X \to \mathbb{R}$ satisfies the following conditions for all $x,y,z \in X$. (Symmetry) $d(x,y)=d(y,x)$. (Identity of Indiscernibles) $d(x,y)=0$ if and only if $x=y$. (Triangle Inequality) $d(x,y)+d(y,z) \geq d(x,z)$.
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vote
Spaces that can't be embedded in the plane
Edit: This is not an answer to the question, but a pointer to the solution of a different problem (due to a misunderstanding on my part)
I'm not an expert on this, so possibly misunderstood something …
