proposition: Lemma subB_is_dropmsb_adcB_invB n (p q: BITS n) : subB p q = dropmsb (adcBmain true p (invB q)).
proof: Proof. by []. Qed.
imports: HB(structures) mathcomp.ssreflect.ssreflect mathcomp(ssrfun ssrbool eqtype ssrnat seq fintype tuple zmodp div) ssrextra.tuple ssrextra.nat spec spec.properties operations mathcomp(ssralg)