fact: Definition R_trans_sym {A B C : Type} (R1 : Param00.Rel A B) (R2 : Param00.Rel B C) : forall (c : C) (a : A), sym_rel (R_trans R1 R2) c a <~> R_trans (sym_rel R2) (sym_rel R1) c a.
imports: Coq(ssreflect) HoTT(HoTT) HoTT_additions Hierarchy Common