--- /dev/null
+include "logic/equality.ma".
+
+(* Inclusion of: GRP516-1.p *)
+
+(* -------------------------------------------------------------------------- *)
+
+(* File : GRP516-1 : TPTP v3.2.0. Bugfixed v2.7.0. *)
+
+(* Domain : Group Theory (Abelian) *)
+
+(* Problem : Axiom for Abelian group theory, in product and inverse, part 4 *)
+
+(* Version : [McC93] (equality) axioms. *)
+
+(* English : *)
+
+(* Refs : [McC93] McCune (1993), Single Axioms for Groups and Abelian Gr *)
+
+(* Source : [TPTP] *)
+
+(* Names : *)
+
+(* Status : Unsatisfiable *)
+
+(* Rating : 0.00 v2.7.0 *)
+
+(* Syntax : Number of clauses : 2 ( 0 non-Horn; 2 unit; 1 RR) *)
+
+(* Number of atoms : 2 ( 2 equality) *)
+
+(* Maximal clause size : 1 ( 1 average) *)
+
+(* Number of predicates : 1 ( 0 propositional; 2-2 arity) *)
+
+(* Number of functors : 4 ( 2 constant; 0-2 arity) *)
+
+(* Number of variables : 3 ( 0 singleton) *)
+
+(* Maximal term depth : 5 ( 2 average) *)
+
+(* Comments : A UEQ part of GRP086-1 *)
+
+(* Bugfixes : v2.7.0 - Grounded conjecture *)
+
+(* -------------------------------------------------------------------------- *)
+ntheorem prove_these_axioms_4:
+ ∀Univ:Type.∀A:Univ.∀B:Univ.∀C:Univ.
+∀a:Univ.
+∀b:Univ.
+∀inverse:∀_:Univ.Univ.
+∀multiply:∀_:Univ.∀_:Univ.Univ.
+∀H0:∀A:Univ.∀B:Univ.∀C:Univ.eq Univ (multiply A (multiply (multiply B C) (inverse (multiply A C)))) B.eq Univ (multiply a b) (multiply b a)
+.
+#Univ.
+#A.
+#B.
+#C.
+#a.
+#b.
+#inverse.
+#multiply.
+#H0.
+nauto by H0;
+nqed.
+
+(* -------------------------------------------------------------------------- *)