fact: Definition uparam_arrow_umap `{Funext} {A A' : Type} (PA : Param04.Rel A A') {B B' : Type} (PB : Param40.Rel B B') : IsUMap (R_arrow PA PB).
imports: elpi(elpi) Coq(ssreflect) HoTT(HoTT) HoTT_additions Hierarchy