fact: Record typ := Typ { sort : numDomainType; #[canonical=no] sort_itv : interval int; #[canonical=no] allP : forall x : sort, spec sort_itv x }.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool) mathcomp(ssrnat eqtype choice order ssralg ssrnum ssrint) mathcomp(interval) mathcomp(mathcomp_extra boolp) signed