Definition:Norm of Subdivision

Definition
Let $\left[{a \,.\,.\, b}\right]$ be a closed interval of the set $\R$ of real numbers.

Let $\Delta = \left\{{x_0, x_1, x_2, \ldots, x_{n-1}, x_n}\right\}$ form a subdivision of $\left[{a \,.\,.\, b}\right]$.

Then the norm of $\Delta$ is defined as:
 * $\max \left\{{x_1 - x_0, x_2 - x_1, \ldots, x_n - x_{n-1}}\right\}$

and is denoted $\left\Vert{ \Delta }\right\Vert$.