+default "equality"
+ cic:/matita/logic/equality/eq.ind
+ cic:/matita/logic/equality/sym_eq.con
+ cic:/matita/logic/equality/trans_eq.con
+ cic:/matita/logic/equality/eq_ind.con
+ cic:/matita/logic/equality/eq_elim_r.con
+ cic:/matita/logic/equality/eq_f.con
+ cic:/matita/logic/equality/eq_OF_eq.con. (* \x.sym (eq_f x) *)
+