## TPTP Problem File: SEV348^5.p

View Solutions - Solve Problem

```%------------------------------------------------------------------------------
% File     : SEV348^5 : TPTP v7.2.0. Released v4.0.0.
% Domain   : Set Theory (GvNB)
% Problem  : TPS problem from GVB-MB-AXIOMS
% Version  : Especial.
% English  :

% Refs     : [Bro09] Brown (2009), Email to Geoff Sutcliffe
% Source   : [Bro09]
% Names    : tps_0753 [Bro09]

% Status   : CounterSatisfiable
% Rating   : 0.25 v7.2.0, 0.33 v5.2.0, 0.00 v4.0.0
% Syntax   : Number of formulae    :    5 (   0 unit;   4 type;   0 defn)
%            Number of atoms       :   11 (   1 equality;   4 variable)
%            Maximal formula depth :    9 (   4 average)
%            Number of connectives :    8 (   0   ~;   0   |;   2   &;   5   @)
%                                         (   1 <=>;   0  =>;   0  <=;   0 <~>)
%                                         (   0  ~|;   0  ~&)
%            Number of type conns  :    4 (   4   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    6 (   4   :;   0   =)
%            Number of variables   :    2 (   0 sgn;   0   !;   2   ?;   0   ^)
%                                         (   2   :;   0  !>;   0  ?*)
%                                         (   0  @-;   0  @+)
% SPC      : TH0_CSA_EQU_NAR

% Comments : This problem is from the TPS library. Copyright (c) 2009 The TPS
%            project in the Department of Mathematical Sciences at Carnegie
%            Mellon University. Distributed under the Creative Commons copyleft
%            license: http://creativecommons.org/licenses/by-sa/3.0/
%          :
%------------------------------------------------------------------------------
thf(x,type,(
x: \$i )).

thf(cGVB_OP,type,(
cGVB_OP: \$i > \$i > \$i )).

thf(cGVB_M,type,(
cGVB_M: \$i > \$o )).

thf(cGVB_OPP,type,(
cGVB_OPP: \$i > \$o )).

thf(cGVB_AX_OPP,conjecture,
( ( cGVB_OPP @ x )
<=> ? [Xy: \$i,Xz: \$i] :
( ( cGVB_M @ Xy )
& ( cGVB_M @ Xz )
& ( x
= ( cGVB_OP @ Xy @ Xz ) ) ) )).

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