fact: Definition problem_wf (p : problem) := match p with | Some (l1, l2) => solved_eqns_wf l1 /\ lforall (notin l2) l1 | _ => True end.
imports: Coq(Relations Wellfounded) CoLoR(ASubstitution ATerm EqUtil ListUtil LogicUtil VecUtil AVariables BoolUtil NatUtil SN AVariables Lexico)