fact: Definition sigT_relation : relation (sigT B) := fun ab a'b' => RA (projT1 ab) (projT1 a'b') \/ (exists pf : projT1 a'b' = projT1 ab, RB (projT2 ab) (eq_rect _ B (projT2 a'b') _ pf)).
imports: Coq.Setoids.Setoid Coq.Program.Program Coq.Program.Wf Coq.Arith.Wf_nat Coq.Classes.Morphisms Coq.Init.Wf Coq.Lists.SetoidList Coq.Arith.PeanoNat Fiat.Common.Coq__8_4__8_5__Compat