Definition:Pre-Measure of Finite Stieltjes Function

Definition
Let $\mathcal{J}_{ho}$ denote the collection of half-open intervals in $\R$.

Let $f: \R \to \R$ be a finite Stieltjes function.

The pre-measure of $f$ is the mapping $\mu_f: \mathcal{J}_{ho} \to \overline{\R}_{\ge 0}$ defined by:


 * $\mu_f \left({ \left[{a \,.\,.\, b}\right) \, }\right) := \begin{cases}

f \left({b}\right) - f\left({a}\right) & \text{if } b \ge a\\ 0 & \text{otherwise} \end{cases}$

where $\overline{\R}_{\ge 0}$ denotes the set of positive extended real numbers.

Also see

 * Pre-Measure of Finite Stieltjes Function is Pre-Measure
 * Pre-Measure of Finite Stieltjes Function Uniquely Extends to Measure