Learning.Algorithm.prodLeft
An algorithm with observations in π§ Γ π¨ obtained from an algorithm with observations in π¨
by ignoring the π§ component of each observation.
Learning.Algorithm.prodLeft.{u_1, u_2, u_4} {π : Type u_1} {π¨ : Type u_2} {mπ : MeasurableSpace π} {mπ¨ : MeasurableSpace π¨} (π§ : Type u_4) [MeasurableSpace π§] (alg : Algorithm π π¨) : Algorithm π (π§ Γ π¨)Learning.Algorithm.prodLeft.{u_1, u_2, u_4} {π : Type u_1} {π¨ : Type u_2} {mπ : MeasurableSpace π} {mπ¨ : MeasurableSpace π¨} (π§ : Type u_4) [MeasurableSpace π§] (alg : Algorithm π π¨) : Algorithm π (π§ Γ π¨)
Code
@[simps]
def Algorithm.prodLeft (π§ : Type*) [MeasurableSpace π§] (alg : Algorithm π π¨) :
Algorithm π (π§ Γ π¨) where
policy n := (alg.policy n).comap (fun h i β¦ ((h i).1, (h i).2.2)) (by fun_prop)
p0 := alg.p0Actions: Source Β· Open Issue
Meaning last changed in v4.34.0-rc2-1-g439785b (2026-08-23), the 2th recorded change.
Self-contained, with its dependencies inlined and proofs replaced by sorry: download the raw file Β· open it in the Lean web editor.
Dependency graph
Audit surface: 1 project declarations, 23 external constants
β Proved: no sorry anywhere in its closure
This is the tool's own reading of one build's recorded axioms, and it is not robust against an author who wants it to pass. Checking meant to be relied on should go through Comparator, which replays the proof through the kernel from an export against an explicit list of permitted axioms.