fact: Definition well_founded_projT1_relation : well_founded R -> well_founded projT1_relation.
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