Definition:Infinite Measure

Definition
Let $\left({X, \Sigma}\right)$ be a measurable space.

Then the infinite measure is the measure defined by:


 * $\mu: \Sigma \to \overline \R, \ \mu \left({E}\right) := \begin{cases} 0 & : \text{if $E = \varnothing$} \\ +\infty & : \text{otherwise}\end{cases}$

where $\overline \R$ denotes the extended real numbers.

Also known as
The infinite measure is sometimes referred to as the trivial measure, but such can cause confusion with the null measure.

Also see

 * Infinite Measure is Measure
 * Definition:Null Measure