1 include "logic/equality.ma".
3 (* Inclusion of: GRP524-1.p *)
5 (* -------------------------------------------------------------------------- *)
7 (* File : GRP524-1 : TPTP v3.7.0. Bugfixed v2.7.0. *)
9 (* Domain : Group Theory (Abelian) *)
11 (* Problem : Axiom for Abelian group theory, in division, part 4 *)
13 (* Version : [McC93] (equality) axioms. *)
17 (* Refs : [Tar38] Tarski (1938), Ein Beitrag zur Axiomatik der Abelschen *)
19 (* : [McC93] McCune (1993), Single Axioms for Groups and Abelian Gr *)
25 (* Status : Unsatisfiable *)
27 (* Rating : 0.00 v3.4.0, 0.12 v3.3.0, 0.00 v2.7.0 *)
29 (* Syntax : Number of clauses : 4 ( 0 non-Horn; 4 unit; 1 RR) *)
31 (* Number of atoms : 4 ( 4 equality) *)
33 (* Maximal clause size : 1 ( 1 average) *)
35 (* Number of predicates : 1 ( 0 propositional; 2-2 arity) *)
37 (* Number of functors : 5 ( 2 constant; 0-2 arity) *)
39 (* Number of variables : 8 ( 0 singleton) *)
41 (* Maximal term depth : 5 ( 3 average) *)
43 (* Comments : A UEQ part of GRP088-1 *)
45 (* Bugfixes : v2.7.0 - Grounded conjecture *)
47 (* -------------------------------------------------------------------------- *)
48 ntheorem prove_these_axioms_4:
49 (∀Univ:Type.∀A:Univ.∀B:Univ.∀C:Univ.
52 ∀divide:∀_:Univ.∀_:Univ.Univ.
53 ∀inverse:∀_:Univ.Univ.
54 ∀multiply:∀_:Univ.∀_:Univ.Univ.
55 ∀H0:∀A:Univ.∀B:Univ.eq Univ (inverse A) (divide (divide B B) A).
56 ∀H1:∀A:Univ.∀B:Univ.∀C:Univ.eq Univ (multiply A B) (divide A (divide (divide C C) B)).
57 ∀H2:∀A:Univ.∀B:Univ.∀C:Univ.eq Univ (divide A (divide B (divide C (divide A B)))) C.eq Univ (multiply a b) (multiply b a))
72 ntry (nassumption) ##;
75 (* -------------------------------------------------------------------------- *)