1 include "logic/equality.ma".
3 (* Inclusion of: LAT033-1.p *)
5 (* -------------------------------------------------------------------------- *)
7 (* File : LAT033-1 : TPTP v3.7.0. Bugfixed v2.5.0. *)
9 (* Domain : Lattice Theory *)
11 (* Problem : Idempotency of join *)
13 (* Version : [McC88] (equality) axioms. *)
17 (* Refs : [DeN00] DeNivelle (2000), Email to G. Sutcliffe *)
19 (* [McC88] McCune (1988), Challenge Equality Problems in Lattice *)
21 (* Source : [DeN00] *)
23 (* Names : idemp_of_join [DeN00] *)
25 (* Status : Unsatisfiable *)
27 (* Rating : 0.00 v2.5.0 *)
29 (* Syntax : Number of clauses : 7 ( 0 non-Horn; 7 unit; 1 RR) *)
31 (* Number of atoms : 7 ( 7 equality) *)
33 (* Maximal clause size : 1 ( 1 average) *)
35 (* Number of predicates : 1 ( 0 propositional; 2-2 arity) *)
37 (* Number of functors : 3 ( 1 constant; 0-2 arity) *)
39 (* Number of variables : 14 ( 2 singleton) *)
41 (* Maximal term depth : 3 ( 2 average) *)
45 (* Bugfixes : v2.5.0 - Used axioms without the conjecture *)
47 (* -------------------------------------------------------------------------- *)
49 (* ----Include lattice theory axioms *)
51 (* include('Axioms/LAT001-0.ax'). *)
53 (* -------------------------------------------------------------------------- *)
54 ntheorem idempotence_of_join:
55 (∀Univ:Type.∀X:Univ.∀Y:Univ.∀Z:Univ.
56 ∀join:∀_:Univ.∀_:Univ.Univ.
57 ∀meet:∀_:Univ.∀_:Univ.Univ.
59 ∀H0:∀X:Univ.∀Y:Univ.∀Z:Univ.eq Univ (join (join X Y) Z) (join X (join Y Z)).
60 ∀H1:∀X:Univ.∀Y:Univ.∀Z:Univ.eq Univ (meet (meet X Y) Z) (meet X (meet Y Z)).
61 ∀H2:∀X:Univ.∀Y:Univ.eq Univ (join X Y) (join Y X).
62 ∀H3:∀X:Univ.∀Y:Univ.eq Univ (meet X Y) (meet Y X).
63 ∀H4:∀X:Univ.∀Y:Univ.eq Univ (join X (meet X Y)) X.
64 ∀H5:∀X:Univ.∀Y:Univ.eq Univ (meet X (join X Y)) X.eq Univ (join xx xx) xx)
79 nauto by H0,H1,H2,H3,H4,H5 ##;
80 ntry (nassumption) ##;
83 (* -------------------------------------------------------------------------- *)