fact: Variables (E R : relation A) (f g : nat -> A) (hyp1 : ISMod (E #) R f g) (NISR : forall h, ~IS R h) (TrsR : transitive R).
imports: CoLoR(RelUtil NatUtil Path LeastNat LogicUtil ClassicUtil SN NotSN_IS SortUtil ListUtil) Coq(IndefiniteDescription)