Measure
Set
context | $\Sigma \in \mathrm{SigmaAlgebra}(X) $ |
definiendum | $ \mu\in \mathrm{measure}(\Sigma)$ |
context | $E\in \Sigma$ |
context | $S\in \mathrm{Sequence}(\Sigma)$ |
inclusion | $\mu:\Sigma\to \overline{\mathbb R} $ |
postulate | $ \mu(E)\ge 0$ |
postulate | $ \mu(\emptyset)=0 $ |
postulate | $ \mu\left(\bigcup_{j=1}^\infty S_j\right)=\sum_{j=1}^\infty \mu(S_j) $ |
Reference
Wikipedia: Measure