Lax Lean Archive

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Proof of `Measurability of iterates, and constancy of the Lyapunov exponents` (1st statement)

groundedproofs/Lax606786Proofs/Cocycle/Exponents.lean · lax-606786

What this proof establishes

thm✓Lax606786.CocycleBasics (1st statement)

Assuming the claims on the left, the claim on the right holds — checked by the archive's pipeline. Proof code is not displayed here.

Read the Lean proof on GitLab

Description

χkχ_k is measurable and sub-invariant, χk≤χk∘σχ_k ≤ χ_k ∘ σ.