fact: Hypothesis H0v1 : forall (v1 : V) (t1 t2 : T), Rel v1 t1 -> Rel dv t2 -> Rel v1 (top t1 t2).
imports: Coq(Rdefinitions Raxioms RIneq Rbasic_fun) mathcomp.ssreflect(ssreflect ssrfun ssrbool eqtype ssrnat seq bigop) MathComp1or2