Definition knot_level := K.knot_level.Definition knot_age1 := K.knot_age1.Module K' := KnotProp2Knot(K.TF)(K).Module KL := Knot_Lemmas(K').

Lemma unsquash_approx : forall k n Fp, unsquash k = (n, Fp) -> Fp = fmap F (approx n) Fp.