A metric, sometimes referred to as a distance function, is a function that defines a real nonnegative distance between every two elements of a set\. It is commonly denoted by the variable d\. In colon\-to notation, a metric d that defines distances between elements of the set S is written: d:StimesSto\[0,infty)
Is [0, inf) same as R+?
Comments
Bryce Woodworth
I was under the impression that R+ doesn't include 0. If that's the case, then it is not the same.