proposition: Lemma bigcapv_inf i0 P Us V : P i0 -> (Us i0 <= V -> \bigcap_(i | P i) Us i <= V)%VS.
proof: Proof. by move=> Pi0; apply: subv_trans; rewrite (bigD1 i0) ?capvSl. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq choice) mathcomp(fintype bigop finfun tuple) mathcomp(ssralg matrix mxalgebra zmodp)