Definition:Filtration of Sigma-Algebra/Continuous Time
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Definition
Let $\struct {X, \Sigma}$ be a measurable space.
Let $\sequence {\FF_t}_{t \ge 0}$ be an $\hointr 0 \infty$-indexed family of sub-$\sigma$-algebras of $\Sigma$ such that:
- $\FF_t \subseteq \FF_s$ whenever $t, s \in \hointr 0 \infty$ are such that $t \le s$.
We say that $\sequence {\FF_t}_{t \ge 0}$ is a filtration of $\Sigma$.
Sources
- 2016: Jean-François Le Gall: Brownian Motion, Martingales, and Stochastic Calculus ... (previous) ... (next): Definition $3.1$