## TPTP Problem File: SEV165^5.p

View Solutions - Solve Problem

```%------------------------------------------------------------------------------
% File     : SEV165^5 : TPTP v7.2.0. Released v4.0.0.
% Domain   : Set Theory
% Problem  : TPS problem EXISTS-CART-SET-PROD
% Version  : Especial.
% English  :

% Refs     : [Bro09] Brown (2009), Email to Geoff Sutcliffe
% Source   : [Bro09]
% Names    : tps_0457 [Bro09]
%          : EXISTS-CART-SET-PROD [TPS]

% Status   : Theorem
% Rating   : 0.70 v7.2.0, 0.62 v7.1.0, 0.71 v7.0.0, 0.88 v6.4.0, 0.86 v6.3.0, 0.83 v5.5.0, 0.80 v5.4.0, 0.75 v4.1.0, 0.67 v4.0.0
% Syntax   : Number of formulae    :    1 (   0 unit;   0 type;   0 defn)
%            Number of atoms       :   10 (   0 equality;  10 variable)
%            Maximal formula depth :   11 (  11 average)
%            Number of connectives :    9 (   0   ~;   0   |;   1   &;   7   @)
%                                         (   1 <=>;   0  =>;   0  <=;   0 <~>)
%                                         (   0  ~|;   0  ~&)
%            Number of type conns  :   12 (  12   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    2 (   0   :;   0   =)
%            Number of variables   :    6 (   0 sgn;   4   !;   1   ?;   1   ^)
%                                         (   6   :;   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(cEXISTS_CART_SET_PROD_pme,conjecture,(
? [CROSS: ( \$i > \$o ) > ( \$i > \$o ) > ( ( \$i > \$i > \$i ) > \$i ) > \$o] :
! [A: \$i > \$o,B: \$i > \$o,Xa: \$i,Xb: \$i] :
( ( CROSS @ A @ B
@ ^ [G: \$i > \$i > \$i] :
( G @ Xa @ Xb ) )
<=> ( ( A @ Xa )
& ( B @ Xb ) ) ) )).

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