Euclidean distance
= Euclidean distance
{c}
{title2=$d_2(x,y)=\|x-y\|_2$}
{wiki}
The <Euclidean distance> between $x,y\in\mathbb R^d$ is
$$
\|x-y\|_2=\sqrt{\sum_{i=1}^d(x_i-y_i)^2}.
$$
= Euclidean distance
{c}
{title2=$d_2(x,y)=\|x-y\|_2$}
{wiki}
The <Euclidean distance> between $x,y\in\mathbb R^d$ is
$$
\|x-y\|_2=\sqrt{\sum_{i=1}^d(x_i-y_i)^2}.
$$