Metric Space
The function needs to be symmetric.
Metric space. D x y 0 if x y and d x y 1 otherwise. G x y 0 iff x y 2. D x y d y x.
The fact that every pair is spread out is why this metric is called discrete. The distance function known as a metric must satisfy a collection of axioms. Metric space is a concept from mathematics.
The discrete metric on the x is given by. A metric space is a set equipped with a distance function which provides a measure of distance between any two points in the set. Metrics on spaces of functions.
A metric space is a set s with a global distance function the metric g that for every two points x y in s gives the distance between them as a nonnegative real number g x y. The positive real numbers with distance function d x y log y x displaystyle d x y vert log. One represents a metric space s s with metric.
Then this does define a metric in which no distinct pair of points are close. Any normed vector space is a. Examples of metric spaces the real numbers with the distance function d x y y x displaystyle d x y vert y x vert given by the.