## TPTP Problem File: SEV359^5.p

View Solutions - Solve Problem

```%------------------------------------------------------------------------------
% File     : SEV359^5 : 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_0842 [Bro09]

% Status   : CounterSatisfiable
% Rating   : 0.33 v5.4.0, 1.00 v5.0.0, 0.33 v4.1.0, 0.00 v4.0.0
% Syntax   : Number of formulae    :    7 (   0 unit;   6 type;   0 defn)
%            Number of atoms       :   21 (   0 equality;   7 variable)
%            Maximal formula depth :   11 (   4 average)
%            Number of connectives :   20 (   0   ~;   0   |;   2   &;  15   @)
%                                         (   1 <=>;   2  =>;   0  <=;   0 <~>)
%                                         (   0  ~|;   0  ~&)
%            Number of type conns  :    7 (   7   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    8 (   6   :;   0   =)
%            Number of variables   :    2 (   0 sgn;   2   !;   0   ?;   0   ^)
%                                         (   2   :;   0  !>;   0  ?*)
%                                         (   0  @-;   0  @+)
% SPC      : TH0_CSA_NEQ_NAR

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

thf(f,type,(
f: \$i )).

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

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

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

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

thf(cGVB_AX_ITERATE_2,conjecture,
( ( cGVB_ITERATE @ f @ g )
<=> ! [Xp: \$i] :
( ( ( cGVB_IN @ f @ Xp )
& ! [Xj: \$i] :
( ( ( cGVB_IN @ Xj @ Xp )
& ( cGVB_M @ ( cGVB_COMPOSE @ Xj @ f ) ) )
=> ( cGVB_IN @ ( cGVB_COMPOSE @ Xj @ f ) @ Xp ) ) )
=> ( cGVB_IN @ g @ Xp ) ) )).

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