cours/mesure sigma finie.md
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up:: [[mesure finie]]
#maths/intégration
> [!definition] [[mesure sigma finie]]
> Soit $(E, \mathcal{A})$ un [[espace mesurable]]
> Une mesure $\mu$ est dite σ-finie (sigma-finie) si :
> $\boxed{\displaystyle\exists (A_{n}) \text{ une suite croissante d'éléments de } \mathcal{A}, \quad \mu(A_{n}) < +\infty \quad \wedge \quad \bigcup _{n}A_{n} = E}$
^definition
# Propriétés
# Exemples