proposition: Lemma alpha3_small : ((α_[3] 0 = 2) * (α_[3] 1 = 3) * (α_[3] 2 = 4) * (α_[3] 3 = 6) * ( α_[3] 4 = 8) * (α_[3] 5 = 9))%type.
proof: Proof. by rewrite /alphaL /delta !S3_small; compute. Qed.
imports: mathcomp(all_ssreflect finmap) hanoi(extra)