fact: Record Env := mk_Env { Env_type : Type; Env_empty : Env_type; Env_add : X -> Ty -> Env_type -> Env_type; Env_In : X -> Env_type -> Prop; Env_MapsTo : X -> Ty -> Env_type -> Prop; Env_Equal : relation Env_type }.
imports: Coq(Relations) CoLoR(VecUtil LogicUtil OrdUtil NatUtil)