proposition: Lemma tval_tcastE m n (eq_mn : m = n) (t : m.-tuple T) : tcast eq_mn t = t :> seq T.
proof: Proof. by case: n / eq_mn. Qed.
imports: mathcomp(all_ssreflect) mathcomp(fingroup perm ssralg morphism perm action) mathcomp(zmodp) mathcomp(vector matrix mxalgebra ssrnum algC) mathcomp(mxrepresentation classfun character) permcomp tools partition congr cycles cycletype presentSn