(* ----Definition of the commutator *)
ntheorem prove_commutator:
- ∀Univ:Type.∀X:Univ.∀Y:Univ.∀Z:Univ.
+ (∀Univ:Type.∀X:Univ.∀Y:Univ.∀Z:Univ.
∀a:Univ.
∀b:Univ.
∀commutator:∀_:Univ.∀_:Univ.Univ.
∀H3:∀X:Univ.eq Univ (multiply X identity) X.
∀H4:∀X:Univ.∀Y:Univ.∀Z:Univ.eq Univ (multiply (multiply X Y) Z) (multiply X (multiply Y Z)).
∀H5:∀X:Univ.eq Univ (multiply (inverse X) X) identity.
-∀H6:∀X:Univ.eq Univ (multiply identity X) X.eq Univ (commutator (commutator a b) b) identity
+∀H6:∀X:Univ.eq Univ (multiply identity X) X.eq Univ (commutator (commutator a b) b) identity)
.
-#Univ.
-#X.
-#Y.
-#Z.
-#a.
-#b.
-#commutator.
-#identity.
-#inverse.
-#multiply.
-#H0.
-#H1.
-#H2.
-#H3.
-#H4.
-#H5.
-#H6.
-nauto by H0,H1,H2,H3,H4,H5,H6;
+#Univ ##.
+#X ##.
+#Y ##.
+#Z ##.
+#a ##.
+#b ##.
+#commutator ##.
+#identity ##.
+#inverse ##.
+#multiply ##.
+#H0 ##.
+#H1 ##.
+#H2 ##.
+#H3 ##.
+#H4 ##.
+#H5 ##.
+#H6 ##.
+nauto by H0,H1,H2,H3,H4,H5,H6 ##;
nqed.
(* -------------------------------------------------------------------------- *)