## TPTP Problem File: SEV464^1.p

View Solutions - Solve Problem

```%------------------------------------------------------------------------------
% File     : SEV464^1 : TPTP v7.5.0. Released v7.0.0.
% Domain   : Analysis
% Problem  : IMAGE_o
% Version  : Especial.
% English  :

% Refs     : [Kal16] Kalisyk (2016), Email to Geoff Sutcliffe
% Source   : [Kal16]
% Names    : IMAGE_o_.p [Kal16]

% Status   : Theorem
% Rating   : 0.75 v7.5.0, 0.67 v7.2.0, 0.75 v7.1.0
% Syntax   : Number of formulae    :    7 (   0 unit;   3 type;   0 defn)
%            Number of atoms       :   61 (   7 equality;  44 variable)
%            Maximal formula depth :   15 (  10 average)
%            Number of connectives :   43 (   0   ~;   0   |;   1   &;  42   @)
%                                         (   0 <=>;   0  =>;   0  <=;   0 <~>)
%                                         (   0  ~|;   0  ~&)
%            Number of type conns  :   22 (  22   >;   0   *;   0   +;   0  <<)
%            Number of symbols     :    5 (   3   :;   0   =;   0  @=)
%                                         (   0  !!;   0  ??;   0 @@+;   0 @@-)
%            Number of variables   :   28 (   0 sgn;  21   !;   1   ?;   0   ^)
%                                         (  28   :;   6  !>;   0  ?*)
%                                         (   0  @-;   0  @+)
% SPC      : TH1_THM_EQU_NAR

% Comments : Exported from core HOL Light.
%------------------------------------------------------------------------------
thf('thf_const_const/trivia/o',type,(
'const/trivia/o':
!>[B: \$tType,A: \$tType,C: \$tType] :
( ( B > C ) > ( A > B ) > A > C ) )).

thf('thf_const_const/sets/IN',type,(
'const/sets/IN':
!>[A: \$tType] :
( A > ( A > \$o ) > \$o ) )).

thf('thf_const_const/sets/IMAGE',type,(
'const/sets/IMAGE':
!>[A: \$tType,B: \$tType] :
( ( A > B ) > ( A > \$o ) > B > \$o ) )).

thf('thm/sets/IN_IMAGE_',axiom,(
! [B: \$tType,A: \$tType,A0: B,A1: A > \$o,A2: A > B] :
( ( 'const/sets/IN' @ B @ A0 @ ( 'const/sets/IMAGE' @ A @ B @ A2 @ A1 ) )
= ( ? [A3: A] :
( ( A0
= ( A2 @ A3 ) )
& ( 'const/sets/IN' @ A @ A3 @ A1 ) ) ) ) )).

thf('thm/trivia/o_THM_',axiom,(
! [C: \$tType,B: \$tType,A: \$tType,A0: B > C,A1: A > B,A2: A] :
( ( 'const/trivia/o' @ B @ A @ C @ A0 @ A1 @ A2 )
= ( A0 @ ( A1 @ A2 ) ) ) )).

thf('thm/sets/EXTENSION_',axiom,(
! [A: \$tType,A0: A > \$o,A1: A > \$o] :
( ( A0 = A1 )
= ( ! [A2: A] :
( ( 'const/sets/IN' @ A @ A2 @ A0 )
= ( 'const/sets/IN' @ A @ A2 @ A1 ) ) ) ) )).

thf('thm/sets/IMAGE_o_',conjecture,(
! [A: \$tType,A0: \$tType,A1: \$tType,A2: A0 > A,A3: A1 > A0,A4: A1 > \$o] :
( ( 'const/sets/IMAGE' @ A1 @ A @ ( 'const/trivia/o' @ A0 @ A1 @ A @ A2 @ A3 ) @ A4 )
= ( 'const/sets/IMAGE' @ A0 @ A @ A2 @ ( 'const/sets/IMAGE' @ A1 @ A0 @ A3 @ A4 ) ) ) )).

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