Theorem: IntuitionisticPropositionalLogic.valid_of_provable (GlimpseOfLean/Exercises/Topics/IntuitionisticPropositionalLogic.lean)

State before:
H : Type ?u.21898
inst✝ : HeytingAlgebra H
v : Variable → H
A B : Formula
Γ Δ : Set Formula
h : Provable A
⊢ Valid A
Tactic:
sorry
State after:
no goals