Definition:Scaled Euclidean Metric

Definition
Let $\R_{>0}$ be the set of strictly positive real numbers.

Let $\delta: \R_{>0} \times \R_{>0} \to \R$ be the metric on $\R_{>0}$ defined as:
 * $\forall x, y \in \R_{>0}: \delta \left({x, y}\right) = \dfrac {\left\lvert{x - y}\right\rvert} {x y}$

Then $\delta$ is the scaled Euclidean metric on $\R_{>0}$.

Also see

 * Scaled Euclidean Metric is Metric