Exists elementary Predictable Set
ProbabilityTheory.stochIoc.exists_elementaryPredictableSet
Mathematical statement
]]σ,τ]] is an elementary predictable set for bounded stopping times on ℕ (blueprint lem:elementaryPredictableSet_stochasticInterval). With τ ≤ n, ]]σ,τ]] = ⋃_{i < n} (i, i+1] × {σ ≤ i < τ} is a finite disjoint union of predictable rectangles, which is exactly the data of an ElementaryPredictableSet.
Source project: Brownian motion
Person-level attribution pending.