proposition: Lemma lift0_perm_lift s k' : lift0_perm s (lift 0 k') = lift (0 : 'I_n.+1) (s k').
proof: Proof. exact: lift_perm_lift. Qed.
imports: HB(structures) mathcomp(ssreflect ssrbool ssrfun eqtype ssrnat seq choice) mathcomp(fintype finfun bigop finset fingroup perm order) mathcomp(div prime binomial ssralg countalg finalg zmodp)