## TPTP Problem File: SEV034^5.p

View Solutions - Solve Problem

```%------------------------------------------------------------------------------
% File     : SEV034^5 : TPTP v7.5.0. Released v4.0.0.
% Domain   : Set Theory (Relations)
% Problem  : TPS problem from EQUIVALENCE-RELATIONS-THMS
% Version  : Especial.
% English  :

% Refs     : [Bro09] Brown (2009), Email to Geoff Sutcliffe
% Source   : [Bro09]
% Names    : tps_1141 [Bro09]

% Status   : Theorem
% Rating   : 0.00 v7.4.0, 0.11 v7.2.0, 0.00 v7.1.0, 0.25 v7.0.0, 0.14 v6.4.0, 0.17 v6.3.0, 0.20 v6.2.0, 0.29 v5.5.0, 0.17 v5.4.0, 0.20 v5.1.0, 0.40 v5.0.0, 0.20 v4.1.0, 0.00 v4.0.1, 0.33 v4.0.0
% Syntax   : Number of formulae    :    3 (   0 unit;   2 type;   0 defn)
%            Number of atoms       :   73 (   2 equality;  71 variable)
%            Maximal formula depth :   22 (   9 average)
%            Number of connectives :   68 (   0   ~;   0   |;   6   &;  50   @)
%                                         (   0 <=>;  12  =>;   0  <=;   0 <~>)
%                                         (   0  ~|;   0  ~&)
%            Number of type conns  :    7 (   7   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    4 (   2   :;   0   =)
%            Number of variables   :   21 (   0 sgn;  21   !;   0   ?;   0   ^)
%                                         (  21   :;   0  !>;   0  ?*)
%                                         (   0  @-;   0  @+)
% SPC      : TH0_THM_EQU_NAR

% Comments : This problem is from the TPS library. Copyright (c) 2009 The TPS
%            project in the Department of Mathematical Sciences at Carnegie
%------------------------------------------------------------------------------
thf(a_type,type,(
a: \$tType )).

thf(b_type,type,(
b: \$tType )).

thf(cTHM518_pme,conjecture,(
! [Xp: a > a > \$o,Xq: a > b > b > \$o,Xf: a > b,Xg: a > b] :
( ! [Xx: a] :
( ( Xp @ Xx @ Xx )
=> ( Xq @ Xx @ ( Xf @ Xx ) @ ( Xg @ Xx ) ) )
=> ( ! [Xx: a,Xy: a] :
( ( Xp @ Xx @ Xy )
=> ( Xq @ Xx @ ( Xf @ Xx ) @ ( Xf @ Xy ) ) )
=> ( ( ! [Xx: a,Xy: a] :
( ( Xp @ Xx @ Xy )
=> ( Xp @ Xy @ Xx ) )
& ! [Xx: a,Xy: a,Xz: a] :
( ( ( Xp @ Xx @ Xy )
& ( Xp @ Xy @ Xz ) )
=> ( Xp @ Xx @ Xz ) )
& ( Xp = Xp ) )
=> ( ! [Xx: a,Xy: a] :
( ( Xp @ Xx @ Xy )
=> ( ! [Xx0: b,Xy0: b] :
( ( Xq @ Xx @ Xx0 @ Xy0 )
=> ( Xq @ Xx @ Xy0 @ Xx0 ) )
& ! [Xx0: b,Xy0: b,Xz: b] :
( ( ( Xq @ Xx @ Xx0 @ Xy0 )
& ( Xq @ Xx @ Xy0 @ Xz ) )
=> ( Xq @ Xx @ Xx0 @ Xz ) )
& ( ( Xq @ Xx )
= ( Xq @ Xy ) ) ) )
=> ! [Xx: a,Xy: a] :
( ( Xp @ Xx @ Xy )
=> ( Xq @ Xx @ ( Xf @ Xx ) @ ( Xg @ Xy ) ) ) ) ) ) ) )).

%------------------------------------------------------------------------------
```