## TPTP Problem File: SEV230^5.p

View Solutions - Solve Problem

```%------------------------------------------------------------------------------
% File     : SEV230^5 : TPTP v7.5.0. Released v4.0.0.
% Domain   : Set Theory (Sets of sets)
% Problem  : TPS problem THM88
% Version  : Especial.
% English  :

% Refs     : [Bro09] Brown (2009), Email to Geoff Sutcliffe
% Source   : [Bro09]
% Names    : tps_0320 [Bro09]
%          : THM88 [TPS]

% Status   : Theorem
% Rating   : 0.08 v7.4.0, 0.00 v6.2.0, 0.17 v6.1.0, 0.00 v5.1.0, 0.25 v5.0.0, 0.00 v4.0.0
% Syntax   : Number of formulae    :    2 (   0 unit;   1 type;   0 defn)
%            Number of atoms       :   16 (   0 equality;  16 variable)
%            Maximal formula depth :   11 (   6 average)
%            Number of connectives :   15 (   0   ~;   0   |;   0   &;   8   @)
%                                         (   0 <=>;   7  =>;   0  <=;   0 <~>)
%                                         (   0  ~|;   0  ~&)
%            Number of type conns  :    6 (   6   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    3 (   1   :;   0   =)
%            Number of variables   :    8 (   0 sgn;   8   !;   0   ?;   0   ^)
%                                         (   8   :;   0  !>;   0  ?*)
%                                         (   0  @-;   0  @+)
% SPC      : TH0_THM_NEQ_NAR

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

thf(cTHM88_pme,conjecture,(
! [U: a > \$o,V: a > \$o] :
( ! [Xx: a] :
( ( U @ Xx )
=> ( V @ Xx ) )
=> ! [Xx: ( a > \$o ) > \$o] :
( ! [Xx0: a > \$o] :
( ( Xx @ Xx0 )
=> ! [Xx1: a] :
( ( Xx0 @ Xx1 )
=> ( U @ Xx1 ) ) )
=> ! [Xx0: a > \$o] :
( ( Xx @ Xx0 )
=> ! [Xx1: a] :
( ( Xx0 @ Xx1 )
=> ( V @ Xx1 ) ) ) ) ) )).

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