TSTP Solution File: SET084-7 by Bliksem---1.12

View Problem - Process Solution

%------------------------------------------------------------------------------
% File     : Bliksem---1.12
% Problem  : SET084-7 : TPTP v8.1.0. Bugfixed v2.1.0.
% Transfm  : none
% Format   : tptp:raw
% Command  : bliksem %s

% Computer : n022.cluster.edu
% Model    : x86_64 x86_64
% CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 2.10GHz
% Memory   : 8042.1875MB
% OS       : Linux 3.10.0-693.el7.x86_64
% CPULimit : 300s
% WCLimit  : 0s
% DateTime : Mon Jul 18 22:46:47 EDT 2022

% Result   : Unsatisfiable 2.20s 2.55s
% Output   : Refutation 2.20s
% Verified : 
% SZS Type : -

% Comments : 
%------------------------------------------------------------------------------
%----WARNING: Could not form TPTP format derivation
%------------------------------------------------------------------------------
%----ORIGINAL SYSTEM OUTPUT
% 0.06/0.12  % Problem  : SET084-7 : TPTP v8.1.0. Bugfixed v2.1.0.
% 0.06/0.12  % Command  : bliksem %s
% 0.12/0.33  % Computer : n022.cluster.edu
% 0.12/0.33  % Model    : x86_64 x86_64
% 0.12/0.33  % CPU      : Intel(R) Xeon(R) CPU E5-2620 v4 @ 2.10GHz
% 0.12/0.33  % Memory   : 8042.1875MB
% 0.12/0.33  % OS       : Linux 3.10.0-693.el7.x86_64
% 0.12/0.33  % CPULimit : 300
% 0.12/0.33  % DateTime : Sun Jul 10 09:53:25 EDT 2022
% 0.12/0.34  % CPUTime  : 
% 0.73/1.09  *** allocated 10000 integers for termspace/termends
% 0.73/1.09  *** allocated 10000 integers for clauses
% 0.73/1.09  *** allocated 10000 integers for justifications
% 0.73/1.09  Bliksem 1.12
% 0.73/1.09  
% 0.73/1.09  
% 0.73/1.09  Automatic Strategy Selection
% 0.73/1.09  
% 0.73/1.09  Clauses:
% 0.73/1.09  [
% 0.73/1.09     [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y ) ],
% 0.73/1.09     [ member( 'not_subclass_element'( X, Y ), X ), subclass( X, Y ) ],
% 0.73/1.09     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), subclass( X, Y ) ]
% 0.73/1.09    ,
% 0.73/1.09     [ subclass( X, 'universal_class' ) ],
% 0.73/1.09     [ ~( =( X, Y ) ), subclass( X, Y ) ],
% 0.73/1.09     [ ~( =( X, Y ) ), subclass( Y, X ) ],
% 0.73/1.09     [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ],
% 0.73/1.09     [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), =( X, Z ) ]
% 0.73/1.09    ,
% 0.73/1.09     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( X, Y
% 0.73/1.09     ) ) ],
% 0.73/1.09     [ ~( member( X, 'universal_class' ) ), member( X, 'unordered_pair'( Y, X
% 0.73/1.09     ) ) ],
% 0.73/1.09     [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ],
% 0.73/1.09     [ =( 'unordered_pair'( X, X ), singleton( X ) ) ],
% 0.73/1.09     [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X, singleton( Y
% 0.73/1.09     ) ) ), 'ordered_pair'( X, Y ) ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.73/1.09    X, Z ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.73/1.09    Y, T ) ],
% 0.73/1.09     [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 'ordered_pair'( X, Z
% 0.73/1.09     ), 'cross_product'( Y, T ) ) ],
% 0.73/1.09     [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 'ordered_pair'( first( X
% 0.73/1.09     ), second( X ) ), X ) ],
% 0.73/1.09     [ subclass( 'element_relation', 'cross_product'( 'universal_class', 
% 0.73/1.09    'universal_class' ) ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' ) ), member( X, 
% 0.73/1.09    Y ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 'universal_class'
% 0.73/1.09    , 'universal_class' ) ) ), ~( member( X, Y ) ), member( 'ordered_pair'( X
% 0.73/1.09    , Y ), 'element_relation' ) ],
% 0.73/1.09     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ],
% 0.73/1.09     [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ],
% 0.73/1.09     [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, intersection( Y, 
% 0.73/1.09    Z ) ) ],
% 0.73/1.09     [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ],
% 0.73/1.09     [ ~( member( X, 'universal_class' ) ), member( X, complement( Y ) ), 
% 0.73/1.09    member( X, Y ) ],
% 0.73/1.09     [ =( complement( intersection( complement( X ), complement( Y ) ) ), 
% 0.73/1.09    union( X, Y ) ) ],
% 0.73/1.09     [ =( intersection( complement( intersection( X, Y ) ), complement( 
% 0.73/1.09    intersection( complement( X ), complement( Y ) ) ) ), 
% 0.73/1.09    'symmetric_difference'( X, Y ) ) ],
% 0.73/1.09     [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( X, Y, Z ) ) ]
% 0.73/1.09    ,
% 0.73/1.09     [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( Z, X, Y ) ) ]
% 0.73/1.09    ,
% 0.73/1.09     [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 'null_class' )
% 0.73/1.09     ), ~( member( Y, 'domain_of'( X ) ) ) ],
% 0.73/1.09     [ ~( member( X, 'universal_class' ) ), =( restrict( Y, singleton( X ), 
% 0.73/1.09    'universal_class' ), 'null_class' ), member( X, 'domain_of'( Y ) ) ],
% 0.73/1.09     [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 0.73/1.09    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), rotate( T ) )
% 0.73/1.09     ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.73/1.09    member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 'cross_product'( 
% 0.73/1.09    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.73/1.09    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X ), 
% 0.73/1.09    Y ), rotate( T ) ) ],
% 0.73/1.09     [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 0.73/1.09    'universal_class', 'universal_class' ), 'universal_class' ) ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), flip( T ) ) )
% 0.73/1.09    , member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), T ) ), ~( 
% 0.73/1.09    member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 'cross_product'( 
% 0.73/1.09    'cross_product'( 'universal_class', 'universal_class' ), 
% 0.73/1.09    'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), 
% 0.73/1.09    Z ), flip( T ) ) ],
% 0.73/1.09     [ =( 'domain_of'( flip( 'cross_product'( X, 'universal_class' ) ) ), 
% 0.73/1.09    inverse( X ) ) ],
% 0.73/1.09     [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ],
% 0.73/1.09     [ =( first( 'not_subclass_element'( restrict( X, Y, singleton( Z ) ), 
% 0.73/1.09    'null_class' ) ), domain( X, Y, Z ) ) ],
% 0.73/1.09     [ =( second( 'not_subclass_element'( restrict( X, singleton( Y ), Z ), 
% 0.73/1.09    'null_class' ) ), range( X, Y, Z ) ) ],
% 0.73/1.09     [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), image( X, Y ) )
% 0.73/1.09     ],
% 0.73/1.09     [ =( union( X, singleton( X ) ), successor( X ) ) ],
% 0.73/1.09     [ subclass( 'successor_relation', 'cross_product'( 'universal_class', 
% 0.73/1.09    'universal_class' ) ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation' ) ), =( 
% 0.73/1.09    successor( X ), Y ) ],
% 0.73/1.09     [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( X, Y ), 
% 0.73/1.09    'cross_product'( 'universal_class', 'universal_class' ) ) ), member( 
% 0.73/1.09    'ordered_pair'( X, Y ), 'successor_relation' ) ],
% 0.73/1.09     [ ~( inductive( X ) ), member( 'null_class', X ) ],
% 0.73/1.09     [ ~( inductive( X ) ), subclass( image( 'successor_relation', X ), X ) ]
% 0.73/1.09    ,
% 0.73/1.09     [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 0.73/1.09    'successor_relation', X ), X ) ), inductive( X ) ],
% 0.73/1.09     [ inductive( omega ) ],
% 0.73/1.09     [ ~( inductive( X ) ), subclass( omega, X ) ],
% 0.73/1.09     [ member( omega, 'universal_class' ) ],
% 0.73/1.09     [ =( 'domain_of'( restrict( 'element_relation', 'universal_class', X ) )
% 0.73/1.09    , 'sum_class'( X ) ) ],
% 0.73/1.09     [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( X ), 
% 0.73/1.09    'universal_class' ) ],
% 0.73/1.09     [ =( complement( image( 'element_relation', complement( X ) ) ), 
% 0.73/1.09    'power_class'( X ) ) ],
% 0.73/1.09     [ ~( member( X, 'universal_class' ) ), member( 'power_class'( X ), 
% 0.73/1.09    'universal_class' ) ],
% 0.73/1.09     [ subclass( compose( X, Y ), 'cross_product'( 'universal_class', 
% 0.73/1.09    'universal_class' ) ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), member( Y, 
% 0.73/1.09    image( Z, image( T, singleton( X ) ) ) ) ],
% 0.73/1.09     [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) ), ~( member( 
% 0.73/1.09    'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 0.73/1.09    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 0.73/1.09     ) ],
% 0.73/1.09     [ ~( 'single_valued_class'( X ) ), subclass( compose( X, inverse( X ) )
% 0.73/1.09    , 'identity_relation' ) ],
% 0.73/1.09     [ ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) ), 
% 0.73/1.09    'single_valued_class'( X ) ],
% 0.73/1.09     [ ~( function( X ) ), subclass( X, 'cross_product'( 'universal_class', 
% 0.73/1.09    'universal_class' ) ) ],
% 0.73/1.09     [ ~( function( X ) ), subclass( compose( X, inverse( X ) ), 
% 0.73/1.09    'identity_relation' ) ],
% 0.73/1.09     [ ~( subclass( X, 'cross_product'( 'universal_class', 'universal_class'
% 0.73/1.09     ) ) ), ~( subclass( compose( X, inverse( X ) ), 'identity_relation' ) )
% 0.73/1.09    , function( X ) ],
% 0.73/1.09     [ ~( function( X ) ), ~( member( Y, 'universal_class' ) ), member( image( 
% 0.73/1.09    X, Y ), 'universal_class' ) ],
% 0.73/1.09     [ =( X, 'null_class' ), member( regular( X ), X ) ],
% 0.73/1.09     [ =( X, 'null_class' ), =( intersection( X, regular( X ) ), 'null_class'
% 0.73/1.09     ) ],
% 0.73/1.09     [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, Y ) ) ],
% 0.73/1.09     [ function( choice ) ],
% 0.73/1.09     [ ~( member( X, 'universal_class' ) ), =( X, 'null_class' ), member( 
% 0.73/1.09    apply( choice, X ), X ) ],
% 0.73/1.09     [ ~( 'one_to_one'( X ) ), function( X ) ],
% 0.73/1.09     [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ],
% 0.73/1.09     [ ~( function( inverse( X ) ) ), ~( function( X ) ), 'one_to_one'( X ) ]
% 0.73/1.09    ,
% 0.73/1.09     [ =( intersection( 'cross_product'( 'universal_class', 'universal_class'
% 0.73/1.09     ), intersection( 'cross_product'( 'universal_class', 'universal_class' )
% 0.73/1.09    , complement( compose( complement( 'element_relation' ), inverse( 
% 0.73/1.09    'element_relation' ) ) ) ) ), 'subset_relation' ) ],
% 0.73/1.09     [ =( intersection( inverse( 'subset_relation' ), 'subset_relation' ), 
% 0.73/1.09    'identity_relation' ) ],
% 0.73/1.09     [ =( complement( 'domain_of'( intersection( X, 'identity_relation' ) ) )
% 0.73/1.09    , diagonalise( X ) ) ],
% 0.73/1.09     [ =( intersection( 'domain_of'( X ), diagonalise( compose( inverse( 
% 0.73/1.09    'element_relation' ), X ) ) ), cantor( X ) ) ],
% 0.73/1.09     [ ~( operation( X ) ), function( X ) ],
% 0.73/1.09     [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 'domain_of'( X )
% 0.73/1.09     ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ],
% 0.73/1.09     [ ~( operation( X ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.73/1.09    'domain_of'( X ) ) ) ],
% 0.73/1.09     [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 'domain_of'( X
% 0.73/1.09     ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) ) ), ~( 
% 0.73/1.09    subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), operation( 
% 0.73/1.09    X ) ],
% 0.73/1.09     [ ~( compatible( X, Y, Z ) ), function( X ) ],
% 0.73/1.09     [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( Y ) ), 
% 0.73/1.09    'domain_of'( X ) ) ],
% 0.73/1.09     [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 'domain_of'( 
% 0.73/1.09    'domain_of'( Z ) ) ) ],
% 0.73/1.09     [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y ) ), 'domain_of'( 
% 0.73/1.09    X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( Z ) ) )
% 0.73/1.09     ), compatible( X, Y, Z ) ],
% 0.73/1.09     [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ],
% 0.73/1.09     [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ],
% 0.73/1.09     [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ],
% 0.73/1.09     [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( T, U ), 
% 0.73/1.09    'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T ), apply( 
% 0.73/1.09    X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ],
% 0.73/1.09     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.73/1.09    member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 0.73/1.09    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 0.73/1.09    , Y ) ],
% 0.73/1.09     [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( Z, X, Y ) ), 
% 0.73/1.09    ~( =( apply( Y, 'ordered_pair'( apply( Z, 'not_homomorphism1'( Z, X, Y )
% 0.73/1.09     ), apply( Z, 'not_homomorphism2'( Z, X, Y ) ) ) ), apply( Z, apply( X, 
% 0.73/1.09    'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 'not_homomorphism2'( Z, X
% 0.73/1.09    , Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.73/1.09    X, 'unordered_pair'( X, Y ) ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.73/1.09    Y, 'unordered_pair'( X, Y ) ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.73/1.09    X, 'universal_class' ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), member( 
% 0.73/1.09    Y, 'universal_class' ) ],
% 0.73/1.09     [ subclass( X, X ) ],
% 0.73/1.09     [ ~( subclass( X, Y ) ), ~( subclass( Y, Z ) ), subclass( X, Z ) ],
% 0.73/1.09     [ =( X, Y ), member( 'not_subclass_element'( X, Y ), X ), member( 
% 0.73/1.09    'not_subclass_element'( Y, X ), Y ) ],
% 0.73/1.09     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( X, Y ), member( 
% 0.73/1.09    'not_subclass_element'( Y, X ), Y ) ],
% 0.73/1.09     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( Y, X ), member( 
% 0.73/1.09    'not_subclass_element'( Y, X ), Y ) ],
% 0.73/1.09     [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), ~( member( 
% 0.73/1.09    'not_subclass_element'( Y, X ), X ) ), =( X, Y ) ],
% 0.73/1.09     [ ~( member( X, intersection( complement( Y ), Y ) ) ) ],
% 0.73/1.09     [ ~( member( X, 'null_class' ) ) ],
% 0.73/1.09     [ subclass( 'null_class', X ) ],
% 0.73/1.09     [ ~( subclass( X, 'null_class' ) ), =( X, 'null_class' ) ],
% 0.73/1.09     [ =( X, 'null_class' ), member( 'not_subclass_element'( X, 'null_class'
% 0.73/1.09     ), X ) ],
% 0.73/1.09     [ member( 'null_class', 'universal_class' ) ],
% 0.73/1.09     [ =( 'unordered_pair'( X, Y ), 'unordered_pair'( Y, X ) ) ],
% 0.73/1.09     [ subclass( singleton( X ), 'unordered_pair'( X, Y ) ) ],
% 0.73/1.09     [ subclass( singleton( X ), 'unordered_pair'( Y, X ) ) ],
% 0.73/1.09     [ member( X, 'universal_class' ), =( 'unordered_pair'( Y, X ), singleton( 
% 0.73/1.09    Y ) ) ],
% 0.73/1.09     [ member( X, 'universal_class' ), =( 'unordered_pair'( X, Y ), singleton( 
% 0.73/1.09    Y ) ) ],
% 0.73/1.09     [ =( 'unordered_pair'( X, Y ), 'null_class' ), member( X, 
% 0.73/1.09    'universal_class' ), member( Y, 'universal_class' ) ],
% 0.73/1.09     [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( X, Z ) ) ), ~( 
% 0.73/1.09    member( 'ordered_pair'( Y, Z ), 'cross_product'( 'universal_class', 
% 0.73/1.09    'universal_class' ) ) ), =( Y, Z ) ],
% 0.73/1.09     [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( Z, Y ) ) ), ~( 
% 0.73/1.09    member( 'ordered_pair'( X, Z ), 'cross_product'( 'universal_class', 
% 0.73/1.09    'universal_class' ) ) ), =( X, Z ) ],
% 0.73/1.09     [ ~( member( X, 'universal_class' ) ), ~( =( 'unordered_pair'( X, Y ), 
% 0.73/1.09    'null_class' ) ) ],
% 0.73/1.09     [ ~( member( X, 'universal_class' ) ), ~( =( 'unordered_pair'( Y, X ), 
% 0.73/1.09    'null_class' ) ) ],
% 0.73/1.09     [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T ) ) ), ~( =( 
% 0.73/1.09    'unordered_pair'( X, Y ), 'null_class' ) ) ],
% 2.20/2.55     [ ~( member( X, Y ) ), ~( member( Z, Y ) ), subclass( 'unordered_pair'( 
% 2.20/2.55    X, Z ), Y ) ],
% 2.20/2.55     [ member( singleton( X ), 'universal_class' ) ],
% 2.20/2.55     [ member( singleton( X ), 'unordered_pair'( Y, singleton( X ) ) ) ],
% 2.20/2.55     [ ~( member( X, 'universal_class' ) ), member( X, singleton( X ) ) ]
% 2.20/2.55    ,
% 2.20/2.55     [ ~( member( X, 'universal_class' ) ), ~( =( singleton( X ), 
% 2.20/2.55    'null_class' ) ) ],
% 2.20/2.55     [ member( 'null_class', singleton( 'null_class' ) ) ],
% 2.20/2.55     [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ],
% 2.20/2.55     [ member( X, 'universal_class' ), =( singleton( X ), 'null_class' ) ]
% 2.20/2.55    ,
% 2.20/2.55     [ =( singleton( x ), singleton( y ) ) ],
% 2.20/2.55     [ member( y, 'universal_class' ) ],
% 2.20/2.55     [ ~( =( x, y ) ) ]
% 2.20/2.55  ] .
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  percentage equality = 0.242063, percentage horn = 0.875969
% 2.20/2.55  This is a problem with some equality
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  Options Used:
% 2.20/2.55  
% 2.20/2.55  useres =            1
% 2.20/2.55  useparamod =        1
% 2.20/2.55  useeqrefl =         1
% 2.20/2.55  useeqfact =         1
% 2.20/2.55  usefactor =         1
% 2.20/2.55  usesimpsplitting =  0
% 2.20/2.55  usesimpdemod =      5
% 2.20/2.55  usesimpres =        3
% 2.20/2.55  
% 2.20/2.55  resimpinuse      =  1000
% 2.20/2.55  resimpclauses =     20000
% 2.20/2.55  substype =          eqrewr
% 2.20/2.55  backwardsubs =      1
% 2.20/2.55  selectoldest =      5
% 2.20/2.55  
% 2.20/2.55  litorderings [0] =  split
% 2.20/2.55  litorderings [1] =  extend the termordering, first sorting on arguments
% 2.20/2.55  
% 2.20/2.55  termordering =      kbo
% 2.20/2.55  
% 2.20/2.55  litapriori =        0
% 2.20/2.55  termapriori =       1
% 2.20/2.55  litaposteriori =    0
% 2.20/2.55  termaposteriori =   0
% 2.20/2.55  demodaposteriori =  0
% 2.20/2.55  ordereqreflfact =   0
% 2.20/2.55  
% 2.20/2.55  litselect =         negord
% 2.20/2.55  
% 2.20/2.55  maxweight =         15
% 2.20/2.55  maxdepth =          30000
% 2.20/2.55  maxlength =         115
% 2.20/2.55  maxnrvars =         195
% 2.20/2.55  excuselevel =       1
% 2.20/2.55  increasemaxweight = 1
% 2.20/2.55  
% 2.20/2.55  maxselected =       10000000
% 2.20/2.55  maxnrclauses =      10000000
% 2.20/2.55  
% 2.20/2.55  showgenerated =    0
% 2.20/2.55  showkept =         0
% 2.20/2.55  showselected =     0
% 2.20/2.55  showdeleted =      0
% 2.20/2.55  showresimp =       1
% 2.20/2.55  showstatus =       2000
% 2.20/2.55  
% 2.20/2.55  prologoutput =     1
% 2.20/2.55  nrgoals =          5000000
% 2.20/2.55  totalproof =       1
% 2.20/2.55  
% 2.20/2.55  Symbols occurring in the translation:
% 2.20/2.55  
% 2.20/2.55  {}  [0, 0]      (w:1, o:2, a:1, s:1, b:0), 
% 2.20/2.55  .  [1, 2]      (w:1, o:56, a:1, s:1, b:0), 
% 2.20/2.55  !  [4, 1]      (w:0, o:31, a:1, s:1, b:0), 
% 2.20/2.55  =  [13, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 2.20/2.55  ==>  [14, 2]      (w:1, o:0, a:0, s:1, b:0), 
% 2.20/2.55  subclass  [41, 2]      (w:1, o:81, a:1, s:1, b:0), 
% 2.20/2.55  member  [43, 2]      (w:1, o:82, a:1, s:1, b:0), 
% 2.20/2.55  'not_subclass_element'  [44, 2]      (w:1, o:83, a:1, s:1, b:0), 
% 2.20/2.55  'universal_class'  [45, 0]      (w:1, o:21, a:1, s:1, b:0), 
% 2.20/2.55  'unordered_pair'  [46, 2]      (w:1, o:84, a:1, s:1, b:0), 
% 2.20/2.55  singleton  [47, 1]      (w:1, o:39, a:1, s:1, b:0), 
% 2.20/2.55  'ordered_pair'  [48, 2]      (w:1, o:85, a:1, s:1, b:0), 
% 2.20/2.55  'cross_product'  [50, 2]      (w:1, o:86, a:1, s:1, b:0), 
% 2.20/2.55  first  [52, 1]      (w:1, o:40, a:1, s:1, b:0), 
% 2.20/2.55  second  [53, 1]      (w:1, o:41, a:1, s:1, b:0), 
% 2.20/2.55  'element_relation'  [54, 0]      (w:1, o:25, a:1, s:1, b:0), 
% 2.20/2.55  intersection  [55, 2]      (w:1, o:88, a:1, s:1, b:0), 
% 2.20/2.55  complement  [56, 1]      (w:1, o:42, a:1, s:1, b:0), 
% 2.20/2.55  union  [57, 2]      (w:1, o:89, a:1, s:1, b:0), 
% 2.20/2.55  'symmetric_difference'  [58, 2]      (w:1, o:90, a:1, s:1, b:0), 
% 2.20/2.55  restrict  [60, 3]      (w:1, o:93, a:1, s:1, b:0), 
% 2.20/2.55  'null_class'  [61, 0]      (w:1, o:26, a:1, s:1, b:0), 
% 2.20/2.55  'domain_of'  [62, 1]      (w:1, o:44, a:1, s:1, b:0), 
% 2.20/2.55  rotate  [63, 1]      (w:1, o:36, a:1, s:1, b:0), 
% 2.20/2.55  flip  [65, 1]      (w:1, o:45, a:1, s:1, b:0), 
% 2.20/2.55  inverse  [66, 1]      (w:1, o:46, a:1, s:1, b:0), 
% 2.20/2.55  'range_of'  [67, 1]      (w:1, o:37, a:1, s:1, b:0), 
% 2.20/2.55  domain  [68, 3]      (w:1, o:95, a:1, s:1, b:0), 
% 2.20/2.55  range  [69, 3]      (w:1, o:96, a:1, s:1, b:0), 
% 2.20/2.55  image  [70, 2]      (w:1, o:87, a:1, s:1, b:0), 
% 2.20/2.55  successor  [71, 1]      (w:1, o:47, a:1, s:1, b:0), 
% 2.20/2.55  'successor_relation'  [72, 0]      (w:1, o:6, a:1, s:1, b:0), 
% 2.20/2.55  inductive  [73, 1]      (w:1, o:48, a:1, s:1, b:0), 
% 2.20/2.55  omega  [74, 0]      (w:1, o:9, a:1, s:1, b:0), 
% 2.20/2.55  'sum_class'  [75, 1]      (w:1, o:49, a:1, s:1, b:0), 
% 2.20/2.55  'power_class'  [76, 1]      (w:1, o:52, a:1, s:1, b:0), 
% 2.20/2.55  compose  [78, 2]      (w:1, o:91, a:1, s:1, b:0), 
% 2.20/2.55  'single_valued_class'  [79, 1]      (w:1, o:53, a:1, s:1, b:0), 
% 2.20/2.55  'identity_relation'  [80, 0]      (w:1, o:27, a:1, s:1, b:0), 
% 2.20/2.55  function  [82, 1]      (w:1, o:54, a:1, s:1, b:0), 
% 2.20/2.55  regular  [83, 1]      (w:1, o:38, a:1, s:1, b:0), 
% 2.20/2.55  apply  [84, 2]      (w:1, o:92, a:1, s:1, b:0), 
% 2.20/2.55  choice  [85, 0]      (w:1, o:28, a:1, s:1, b:0), 
% 2.20/2.55  'one_to_one'  [86, 1]      (w:1, o:50, a:1, s:1, b:0), 
% 2.20/2.55  'subset_relation'  [87, 0]      (w:1, o:5, a:1, s:1, b:0), 
% 2.20/2.55  diagonalise  [88, 1]      (w:1, o:55, a:1, s:1, b:0), 
% 2.20/2.55  cantor  [89, 1]      (w:1, o:43, a:1, s:1, b:0), 
% 2.20/2.55  operation  [90, 1]      (w:1, o:51, a:1, s:1, b:0), 
% 2.20/2.55  compatible  [94, 3]      (w:1, o:94, a:1, s:1, b:0), 
% 2.20/2.55  homomorphism  [95, 3]      (w:1, o:97, a:1, s:1, b:0), 
% 2.20/2.55  'not_homomorphism1'  [96, 3]      (w:1, o:98, a:1, s:1, b:0), 
% 2.20/2.55  'not_homomorphism2'  [97, 3]      (w:1, o:99, a:1, s:1, b:0), 
% 2.20/2.55  x  [98, 0]      (w:1, o:29, a:1, s:1, b:0), 
% 2.20/2.55  y  [99, 0]      (w:1, o:30, a:1, s:1, b:0).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  Starting Search:
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  Intermediate Status:
% 2.20/2.55  Generated:    3807
% 2.20/2.55  Kept:         2005
% 2.20/2.55  Inuse:        117
% 2.20/2.55  Deleted:      2
% 2.20/2.55  Deletedinuse: 2
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  Intermediate Status:
% 2.20/2.55  Generated:    9520
% 2.20/2.55  Kept:         4235
% 2.20/2.55  Inuse:        201
% 2.20/2.55  Deleted:      8
% 2.20/2.55  Deletedinuse: 8
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  Intermediate Status:
% 2.20/2.55  Generated:    14636
% 2.20/2.55  Kept:         6242
% 2.20/2.55  Inuse:        280
% 2.20/2.55  Deleted:      12
% 2.20/2.55  Deletedinuse: 11
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  Intermediate Status:
% 2.20/2.55  Generated:    20535
% 2.20/2.55  Kept:         8250
% 2.20/2.55  Inuse:        330
% 2.20/2.55  Deleted:      56
% 2.20/2.55  Deletedinuse: 52
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  Intermediate Status:
% 2.20/2.55  Generated:    29175
% 2.20/2.55  Kept:         11036
% 2.20/2.55  Inuse:        397
% 2.20/2.55  Deleted:      71
% 2.20/2.55  Deletedinuse: 57
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  Intermediate Status:
% 2.20/2.55  Generated:    38700
% 2.20/2.55  Kept:         13051
% 2.20/2.55  Inuse:        446
% 2.20/2.55  Deleted:      73
% 2.20/2.55  Deletedinuse: 58
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  Intermediate Status:
% 2.20/2.55  Generated:    45665
% 2.20/2.55  Kept:         15051
% 2.20/2.55  Inuse:        485
% 2.20/2.55  Deleted:      87
% 2.20/2.55  Deletedinuse: 71
% 2.20/2.55  
% 2.20/2.55  Resimplifying inuse:
% 2.20/2.55  Done
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  Bliksems!, er is een bewijs:
% 2.20/2.55  % SZS status Unsatisfiable
% 2.20/2.55  % SZS output start Refutation
% 2.20/2.55  
% 2.20/2.55  clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.55    'unordered_pair'( Y, X ) ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 10, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 122, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 124, [ =( singleton( y ), singleton( x ) ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 125, [ member( y, 'universal_class' ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 126, [ ~( =( y, x ) ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 159, [ =( X, Y ), ~( =( Y, X ) ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 459, [ member( y, 'unordered_pair'( X, y ) ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 491, [ member( y, singleton( x ) ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 555, [ member( X, singleton( x ) ), ~( =( X, y ) ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 606, [ ~( =( X, x ) ), ~( =( X, y ) ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 15241, [ ~( =( X, y ) ) ] )
% 2.20/2.55  .
% 2.20/2.55  clause( 16987, [] )
% 2.20/2.55  .
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  % SZS output end Refutation
% 2.20/2.55  found a proof!
% 2.20/2.55  
% 2.20/2.55  % ABCDEFGHIJKLMNOPQRSTUVWXYZ
% 2.20/2.55  
% 2.20/2.55  initialclauses(
% 2.20/2.55  [ clause( 16989, [ ~( subclass( X, Y ) ), ~( member( Z, X ) ), member( Z, Y
% 2.20/2.55     ) ] )
% 2.20/2.55  , clause( 16990, [ member( 'not_subclass_element'( X, Y ), X ), subclass( X
% 2.20/2.55    , Y ) ] )
% 2.20/2.55  , clause( 16991, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), 
% 2.20/2.55    subclass( X, Y ) ] )
% 2.20/2.55  , clause( 16992, [ subclass( X, 'universal_class' ) ] )
% 2.20/2.55  , clause( 16993, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.55  , clause( 16994, [ ~( =( X, Y ) ), subclass( Y, X ) ] )
% 2.20/2.55  , clause( 16995, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y )
% 2.20/2.55     ] )
% 2.20/2.55  , clause( 16996, [ ~( member( X, 'unordered_pair'( Y, Z ) ) ), =( X, Y ), 
% 2.20/2.55    =( X, Z ) ] )
% 2.20/2.55  , clause( 16997, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.55    'unordered_pair'( X, Y ) ) ] )
% 2.20/2.55  , clause( 16998, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.55    'unordered_pair'( Y, X ) ) ] )
% 2.20/2.55  , clause( 16999, [ member( 'unordered_pair'( X, Y ), 'universal_class' ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17000, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 2.20/2.55  , clause( 17001, [ =( 'unordered_pair'( singleton( X ), 'unordered_pair'( X
% 2.20/2.55    , singleton( Y ) ) ), 'ordered_pair'( X, Y ) ) ] )
% 2.20/2.55  , clause( 17002, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.55     ) ) ), member( X, Z ) ] )
% 2.20/2.55  , clause( 17003, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.55     ) ) ), member( Y, T ) ] )
% 2.20/2.55  , clause( 17004, [ ~( member( X, Y ) ), ~( member( Z, T ) ), member( 
% 2.20/2.55    'ordered_pair'( X, Z ), 'cross_product'( Y, T ) ) ] )
% 2.20/2.55  , clause( 17005, [ ~( member( X, 'cross_product'( Y, Z ) ) ), =( 
% 2.20/2.55    'ordered_pair'( first( X ), second( X ) ), X ) ] )
% 2.20/2.55  , clause( 17006, [ subclass( 'element_relation', 'cross_product'( 
% 2.20/2.55    'universal_class', 'universal_class' ) ) ] )
% 2.20/2.55  , clause( 17007, [ ~( member( 'ordered_pair'( X, Y ), 'element_relation' )
% 2.20/2.55     ), member( X, Y ) ] )
% 2.20/2.55  , clause( 17008, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( 
% 2.20/2.55    'universal_class', 'universal_class' ) ) ), ~( member( X, Y ) ), member( 
% 2.20/2.55    'ordered_pair'( X, Y ), 'element_relation' ) ] )
% 2.20/2.55  , clause( 17009, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Y ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17010, [ ~( member( X, intersection( Y, Z ) ) ), member( X, Z ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17011, [ ~( member( X, Y ) ), ~( member( X, Z ) ), member( X, 
% 2.20/2.55    intersection( Y, Z ) ) ] )
% 2.20/2.55  , clause( 17012, [ ~( member( X, complement( Y ) ) ), ~( member( X, Y ) ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17013, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.55    complement( Y ) ), member( X, Y ) ] )
% 2.20/2.55  , clause( 17014, [ =( complement( intersection( complement( X ), complement( 
% 2.20/2.55    Y ) ) ), union( X, Y ) ) ] )
% 2.20/2.55  , clause( 17015, [ =( intersection( complement( intersection( X, Y ) ), 
% 2.20/2.55    complement( intersection( complement( X ), complement( Y ) ) ) ), 
% 2.20/2.55    'symmetric_difference'( X, Y ) ) ] )
% 2.20/2.55  , clause( 17016, [ =( intersection( X, 'cross_product'( Y, Z ) ), restrict( 
% 2.20/2.55    X, Y, Z ) ) ] )
% 2.20/2.55  , clause( 17017, [ =( intersection( 'cross_product'( X, Y ), Z ), restrict( 
% 2.20/2.55    Z, X, Y ) ) ] )
% 2.20/2.55  , clause( 17018, [ ~( =( restrict( X, singleton( Y ), 'universal_class' ), 
% 2.20/2.55    'null_class' ) ), ~( member( Y, 'domain_of'( X ) ) ) ] )
% 2.20/2.55  , clause( 17019, [ ~( member( X, 'universal_class' ) ), =( restrict( Y, 
% 2.20/2.55    singleton( X ), 'universal_class' ), 'null_class' ), member( X, 
% 2.20/2.55    'domain_of'( Y ) ) ] )
% 2.20/2.55  , clause( 17020, [ subclass( rotate( X ), 'cross_product'( 'cross_product'( 
% 2.20/2.55    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 2.20/2.55  , clause( 17021, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 2.20/2.55    rotate( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, Z ), X ), T )
% 2.20/2.55     ] )
% 2.20/2.55  , clause( 17022, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 2.20/2.55    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Z, X ), Y ), 
% 2.20/2.55    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 2.20/2.55    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Z, X )
% 2.20/2.55    , Y ), rotate( T ) ) ] )
% 2.20/2.55  , clause( 17023, [ subclass( flip( X ), 'cross_product'( 'cross_product'( 
% 2.20/2.55    'universal_class', 'universal_class' ), 'universal_class' ) ) ] )
% 2.20/2.55  , clause( 17024, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 2.20/2.55    flip( T ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), T ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17025, [ ~( member( 'ordered_pair'( 'ordered_pair'( X, Y ), Z ), 
% 2.20/2.55    T ) ), ~( member( 'ordered_pair'( 'ordered_pair'( Y, X ), Z ), 
% 2.20/2.55    'cross_product'( 'cross_product'( 'universal_class', 'universal_class' )
% 2.20/2.55    , 'universal_class' ) ) ), member( 'ordered_pair'( 'ordered_pair'( Y, X )
% 2.20/2.55    , Z ), flip( T ) ) ] )
% 2.20/2.55  , clause( 17026, [ =( 'domain_of'( flip( 'cross_product'( X, 
% 2.20/2.55    'universal_class' ) ) ), inverse( X ) ) ] )
% 2.20/2.55  , clause( 17027, [ =( 'domain_of'( inverse( X ) ), 'range_of'( X ) ) ] )
% 2.20/2.55  , clause( 17028, [ =( first( 'not_subclass_element'( restrict( X, Y, 
% 2.20/2.55    singleton( Z ) ), 'null_class' ) ), domain( X, Y, Z ) ) ] )
% 2.20/2.55  , clause( 17029, [ =( second( 'not_subclass_element'( restrict( X, 
% 2.20/2.55    singleton( Y ), Z ), 'null_class' ) ), range( X, Y, Z ) ) ] )
% 2.20/2.55  , clause( 17030, [ =( 'range_of'( restrict( X, Y, 'universal_class' ) ), 
% 2.20/2.55    image( X, Y ) ) ] )
% 2.20/2.55  , clause( 17031, [ =( union( X, singleton( X ) ), successor( X ) ) ] )
% 2.20/2.55  , clause( 17032, [ subclass( 'successor_relation', 'cross_product'( 
% 2.20/2.55    'universal_class', 'universal_class' ) ) ] )
% 2.20/2.55  , clause( 17033, [ ~( member( 'ordered_pair'( X, Y ), 'successor_relation'
% 2.20/2.55     ) ), =( successor( X ), Y ) ] )
% 2.20/2.55  , clause( 17034, [ ~( =( successor( X ), Y ) ), ~( member( 'ordered_pair'( 
% 2.20/2.55    X, Y ), 'cross_product'( 'universal_class', 'universal_class' ) ) ), 
% 2.20/2.55    member( 'ordered_pair'( X, Y ), 'successor_relation' ) ] )
% 2.20/2.55  , clause( 17035, [ ~( inductive( X ) ), member( 'null_class', X ) ] )
% 2.20/2.55  , clause( 17036, [ ~( inductive( X ) ), subclass( image( 
% 2.20/2.55    'successor_relation', X ), X ) ] )
% 2.20/2.55  , clause( 17037, [ ~( member( 'null_class', X ) ), ~( subclass( image( 
% 2.20/2.55    'successor_relation', X ), X ) ), inductive( X ) ] )
% 2.20/2.55  , clause( 17038, [ inductive( omega ) ] )
% 2.20/2.55  , clause( 17039, [ ~( inductive( X ) ), subclass( omega, X ) ] )
% 2.20/2.55  , clause( 17040, [ member( omega, 'universal_class' ) ] )
% 2.20/2.55  , clause( 17041, [ =( 'domain_of'( restrict( 'element_relation', 
% 2.20/2.55    'universal_class', X ) ), 'sum_class'( X ) ) ] )
% 2.20/2.55  , clause( 17042, [ ~( member( X, 'universal_class' ) ), member( 'sum_class'( 
% 2.20/2.55    X ), 'universal_class' ) ] )
% 2.20/2.55  , clause( 17043, [ =( complement( image( 'element_relation', complement( X
% 2.20/2.55     ) ) ), 'power_class'( X ) ) ] )
% 2.20/2.55  , clause( 17044, [ ~( member( X, 'universal_class' ) ), member( 
% 2.20/2.55    'power_class'( X ), 'universal_class' ) ] )
% 2.20/2.55  , clause( 17045, [ subclass( compose( X, Y ), 'cross_product'( 
% 2.20/2.55    'universal_class', 'universal_class' ) ) ] )
% 2.20/2.55  , clause( 17046, [ ~( member( 'ordered_pair'( X, Y ), compose( Z, T ) ) ), 
% 2.20/2.55    member( Y, image( Z, image( T, singleton( X ) ) ) ) ] )
% 2.20/2.55  , clause( 17047, [ ~( member( X, image( Y, image( Z, singleton( T ) ) ) ) )
% 2.20/2.55    , ~( member( 'ordered_pair'( T, X ), 'cross_product'( 'universal_class', 
% 2.20/2.55    'universal_class' ) ) ), member( 'ordered_pair'( T, X ), compose( Y, Z )
% 2.20/2.55     ) ] )
% 2.20/2.55  , clause( 17048, [ ~( 'single_valued_class'( X ) ), subclass( compose( X, 
% 2.20/2.55    inverse( X ) ), 'identity_relation' ) ] )
% 2.20/2.55  , clause( 17049, [ ~( subclass( compose( X, inverse( X ) ), 
% 2.20/2.55    'identity_relation' ) ), 'single_valued_class'( X ) ] )
% 2.20/2.55  , clause( 17050, [ ~( function( X ) ), subclass( X, 'cross_product'( 
% 2.20/2.55    'universal_class', 'universal_class' ) ) ] )
% 2.20/2.55  , clause( 17051, [ ~( function( X ) ), subclass( compose( X, inverse( X ) )
% 2.20/2.55    , 'identity_relation' ) ] )
% 2.20/2.55  , clause( 17052, [ ~( subclass( X, 'cross_product'( 'universal_class', 
% 2.20/2.55    'universal_class' ) ) ), ~( subclass( compose( X, inverse( X ) ), 
% 2.20/2.55    'identity_relation' ) ), function( X ) ] )
% 2.20/2.55  , clause( 17053, [ ~( function( X ) ), ~( member( Y, 'universal_class' ) )
% 2.20/2.55    , member( image( X, Y ), 'universal_class' ) ] )
% 2.20/2.55  , clause( 17054, [ =( X, 'null_class' ), member( regular( X ), X ) ] )
% 2.20/2.55  , clause( 17055, [ =( X, 'null_class' ), =( intersection( X, regular( X ) )
% 2.20/2.55    , 'null_class' ) ] )
% 2.20/2.55  , clause( 17056, [ =( 'sum_class'( image( X, singleton( Y ) ) ), apply( X, 
% 2.20/2.55    Y ) ) ] )
% 2.20/2.55  , clause( 17057, [ function( choice ) ] )
% 2.20/2.55  , clause( 17058, [ ~( member( X, 'universal_class' ) ), =( X, 'null_class'
% 2.20/2.55     ), member( apply( choice, X ), X ) ] )
% 2.20/2.55  , clause( 17059, [ ~( 'one_to_one'( X ) ), function( X ) ] )
% 2.20/2.55  , clause( 17060, [ ~( 'one_to_one'( X ) ), function( inverse( X ) ) ] )
% 2.20/2.55  , clause( 17061, [ ~( function( inverse( X ) ) ), ~( function( X ) ), 
% 2.20/2.55    'one_to_one'( X ) ] )
% 2.20/2.55  , clause( 17062, [ =( intersection( 'cross_product'( 'universal_class', 
% 2.20/2.55    'universal_class' ), intersection( 'cross_product'( 'universal_class', 
% 2.20/2.55    'universal_class' ), complement( compose( complement( 'element_relation'
% 2.20/2.55     ), inverse( 'element_relation' ) ) ) ) ), 'subset_relation' ) ] )
% 2.20/2.55  , clause( 17063, [ =( intersection( inverse( 'subset_relation' ), 
% 2.20/2.55    'subset_relation' ), 'identity_relation' ) ] )
% 2.20/2.55  , clause( 17064, [ =( complement( 'domain_of'( intersection( X, 
% 2.20/2.55    'identity_relation' ) ) ), diagonalise( X ) ) ] )
% 2.20/2.55  , clause( 17065, [ =( intersection( 'domain_of'( X ), diagonalise( compose( 
% 2.20/2.55    inverse( 'element_relation' ), X ) ) ), cantor( X ) ) ] )
% 2.20/2.55  , clause( 17066, [ ~( operation( X ) ), function( X ) ] )
% 2.20/2.55  , clause( 17067, [ ~( operation( X ) ), =( 'cross_product'( 'domain_of'( 
% 2.20/2.55    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 2.20/2.55     ] )
% 2.20/2.55  , clause( 17068, [ ~( operation( X ) ), subclass( 'range_of'( X ), 
% 2.20/2.55    'domain_of'( 'domain_of'( X ) ) ) ] )
% 2.20/2.55  , clause( 17069, [ ~( function( X ) ), ~( =( 'cross_product'( 'domain_of'( 
% 2.20/2.55    'domain_of'( X ) ), 'domain_of'( 'domain_of'( X ) ) ), 'domain_of'( X ) )
% 2.20/2.55     ), ~( subclass( 'range_of'( X ), 'domain_of'( 'domain_of'( X ) ) ) ), 
% 2.20/2.55    operation( X ) ] )
% 2.20/2.55  , clause( 17070, [ ~( compatible( X, Y, Z ) ), function( X ) ] )
% 2.20/2.55  , clause( 17071, [ ~( compatible( X, Y, Z ) ), =( 'domain_of'( 'domain_of'( 
% 2.20/2.55    Y ) ), 'domain_of'( X ) ) ] )
% 2.20/2.55  , clause( 17072, [ ~( compatible( X, Y, Z ) ), subclass( 'range_of'( X ), 
% 2.20/2.55    'domain_of'( 'domain_of'( Z ) ) ) ] )
% 2.20/2.55  , clause( 17073, [ ~( function( X ) ), ~( =( 'domain_of'( 'domain_of'( Y )
% 2.20/2.55     ), 'domain_of'( X ) ) ), ~( subclass( 'range_of'( X ), 'domain_of'( 
% 2.20/2.55    'domain_of'( Z ) ) ) ), compatible( X, Y, Z ) ] )
% 2.20/2.55  , clause( 17074, [ ~( homomorphism( X, Y, Z ) ), operation( Y ) ] )
% 2.20/2.55  , clause( 17075, [ ~( homomorphism( X, Y, Z ) ), operation( Z ) ] )
% 2.20/2.55  , clause( 17076, [ ~( homomorphism( X, Y, Z ) ), compatible( X, Y, Z ) ] )
% 2.20/2.55  , clause( 17077, [ ~( homomorphism( X, Y, Z ) ), ~( member( 'ordered_pair'( 
% 2.20/2.55    T, U ), 'domain_of'( Y ) ) ), =( apply( Z, 'ordered_pair'( apply( X, T )
% 2.20/2.55    , apply( X, U ) ) ), apply( X, apply( Y, 'ordered_pair'( T, U ) ) ) ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17078, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 2.20/2.55    Z, X, Y ) ), member( 'ordered_pair'( 'not_homomorphism1'( Z, X, Y ), 
% 2.20/2.55    'not_homomorphism2'( Z, X, Y ) ), 'domain_of'( X ) ), homomorphism( Z, X
% 2.20/2.55    , Y ) ] )
% 2.20/2.55  , clause( 17079, [ ~( operation( X ) ), ~( operation( Y ) ), ~( compatible( 
% 2.20/2.55    Z, X, Y ) ), ~( =( apply( Y, 'ordered_pair'( apply( Z, 
% 2.20/2.55    'not_homomorphism1'( Z, X, Y ) ), apply( Z, 'not_homomorphism2'( Z, X, Y
% 2.20/2.55     ) ) ) ), apply( Z, apply( X, 'ordered_pair'( 'not_homomorphism1'( Z, X, 
% 2.20/2.55    Y ), 'not_homomorphism2'( Z, X, Y ) ) ) ) ) ), homomorphism( Z, X, Y ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17080, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.55     ) ) ), member( X, 'unordered_pair'( X, Y ) ) ] )
% 2.20/2.55  , clause( 17081, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.55     ) ) ), member( Y, 'unordered_pair'( X, Y ) ) ] )
% 2.20/2.55  , clause( 17082, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.55     ) ) ), member( X, 'universal_class' ) ] )
% 2.20/2.55  , clause( 17083, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.55     ) ) ), member( Y, 'universal_class' ) ] )
% 2.20/2.55  , clause( 17084, [ subclass( X, X ) ] )
% 2.20/2.55  , clause( 17085, [ ~( subclass( X, Y ) ), ~( subclass( Y, Z ) ), subclass( 
% 2.20/2.55    X, Z ) ] )
% 2.20/2.55  , clause( 17086, [ =( X, Y ), member( 'not_subclass_element'( X, Y ), X ), 
% 2.20/2.55    member( 'not_subclass_element'( Y, X ), Y ) ] )
% 2.20/2.55  , clause( 17087, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( X, 
% 2.20/2.55    Y ), member( 'not_subclass_element'( Y, X ), Y ) ] )
% 2.20/2.55  , clause( 17088, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), =( Y, 
% 2.20/2.55    X ), member( 'not_subclass_element'( Y, X ), Y ) ] )
% 2.20/2.55  , clause( 17089, [ ~( member( 'not_subclass_element'( X, Y ), Y ) ), ~( 
% 2.20/2.55    member( 'not_subclass_element'( Y, X ), X ) ), =( X, Y ) ] )
% 2.20/2.55  , clause( 17090, [ ~( member( X, intersection( complement( Y ), Y ) ) ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17091, [ ~( member( X, 'null_class' ) ) ] )
% 2.20/2.55  , clause( 17092, [ subclass( 'null_class', X ) ] )
% 2.20/2.55  , clause( 17093, [ ~( subclass( X, 'null_class' ) ), =( X, 'null_class' ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17094, [ =( X, 'null_class' ), member( 'not_subclass_element'( X
% 2.20/2.55    , 'null_class' ), X ) ] )
% 2.20/2.55  , clause( 17095, [ member( 'null_class', 'universal_class' ) ] )
% 2.20/2.55  , clause( 17096, [ =( 'unordered_pair'( X, Y ), 'unordered_pair'( Y, X ) )
% 2.20/2.55     ] )
% 2.20/2.55  , clause( 17097, [ subclass( singleton( X ), 'unordered_pair'( X, Y ) ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17098, [ subclass( singleton( X ), 'unordered_pair'( Y, X ) ) ]
% 2.20/2.55     )
% 2.20/2.55  , clause( 17099, [ member( X, 'universal_class' ), =( 'unordered_pair'( Y, 
% 2.20/2.55    X ), singleton( Y ) ) ] )
% 2.20/2.55  , clause( 17100, [ member( X, 'universal_class' ), =( 'unordered_pair'( X, 
% 2.20/2.55    Y ), singleton( Y ) ) ] )
% 2.20/2.55  , clause( 17101, [ =( 'unordered_pair'( X, Y ), 'null_class' ), member( X, 
% 2.20/2.55    'universal_class' ), member( Y, 'universal_class' ) ] )
% 2.20/2.55  , clause( 17102, [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( X, Z )
% 2.20/2.55     ) ), ~( member( 'ordered_pair'( Y, Z ), 'cross_product'( 
% 2.20/2.55    'universal_class', 'universal_class' ) ) ), =( Y, Z ) ] )
% 2.20/2.55  , clause( 17103, [ ~( =( 'unordered_pair'( X, Y ), 'unordered_pair'( Z, Y )
% 2.20/2.55     ) ), ~( member( 'ordered_pair'( X, Z ), 'cross_product'( 
% 2.20/2.55    'universal_class', 'universal_class' ) ) ), =( X, Z ) ] )
% 2.20/2.55  , clause( 17104, [ ~( member( X, 'universal_class' ) ), ~( =( 
% 2.20/2.55    'unordered_pair'( X, Y ), 'null_class' ) ) ] )
% 2.20/2.55  , clause( 17105, [ ~( member( X, 'universal_class' ) ), ~( =( 
% 2.20/2.55    'unordered_pair'( Y, X ), 'null_class' ) ) ] )
% 2.20/2.55  , clause( 17106, [ ~( member( 'ordered_pair'( X, Y ), 'cross_product'( Z, T
% 2.20/2.55     ) ) ), ~( =( 'unordered_pair'( X, Y ), 'null_class' ) ) ] )
% 2.20/2.55  , clause( 17107, [ ~( member( X, Y ) ), ~( member( Z, Y ) ), subclass( 
% 2.20/2.55    'unordered_pair'( X, Z ), Y ) ] )
% 2.20/2.55  , clause( 17108, [ member( singleton( X ), 'universal_class' ) ] )
% 2.20/2.55  , clause( 17109, [ member( singleton( X ), 'unordered_pair'( Y, singleton( 
% 2.20/2.55    X ) ) ) ] )
% 2.20/2.55  , clause( 17110, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.55    singleton( X ) ) ] )
% 2.20/2.55  , clause( 17111, [ ~( member( X, 'universal_class' ) ), ~( =( singleton( X
% 2.20/2.55     ), 'null_class' ) ) ] )
% 2.20/2.55  , clause( 17112, [ member( 'null_class', singleton( 'null_class' ) ) ] )
% 2.20/2.55  , clause( 17113, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 2.20/2.55  , clause( 17114, [ member( X, 'universal_class' ), =( singleton( X ), 
% 2.20/2.55    'null_class' ) ] )
% 2.20/2.55  , clause( 17115, [ =( singleton( x ), singleton( y ) ) ] )
% 2.20/2.55  , clause( 17116, [ member( y, 'universal_class' ) ] )
% 2.20/2.55  , clause( 17117, [ ~( =( x, y ) ) ] )
% 2.20/2.55  ] ).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  subsumption(
% 2.20/2.55  clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.55  , clause( 16993, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.55  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 2.20/2.55     ), ==>( 1, 1 )] ) ).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  subsumption(
% 2.20/2.55  clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 2.20/2.55  , clause( 16995, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y )
% 2.20/2.55     ] )
% 2.20/2.55  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 2.20/2.55     ), ==>( 1, 1 ), ==>( 2, 2 )] ) ).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  subsumption(
% 2.20/2.55  clause( 8, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.55    'unordered_pair'( Y, X ) ) ] )
% 2.20/2.55  , clause( 16998, [ ~( member( X, 'universal_class' ) ), member( X, 
% 2.20/2.55    'unordered_pair'( Y, X ) ) ] )
% 2.20/2.55  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 2.20/2.55     ), ==>( 1, 1 )] ) ).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  subsumption(
% 2.20/2.55  clause( 10, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 2.20/2.55  , clause( 17000, [ =( 'unordered_pair'( X, X ), singleton( X ) ) ] )
% 2.20/2.55  , substitution( 0, [ :=( X, X )] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  subsumption(
% 2.20/2.55  clause( 122, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 2.20/2.55  , clause( 17113, [ ~( member( X, singleton( Y ) ) ), =( X, Y ) ] )
% 2.20/2.55  , substitution( 0, [ :=( X, X ), :=( Y, Y )] ), permutation( 0, [ ==>( 0, 0
% 2.20/2.55     ), ==>( 1, 1 )] ) ).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  eqswap(
% 2.20/2.55  clause( 17288, [ =( singleton( y ), singleton( x ) ) ] )
% 2.20/2.55  , clause( 17115, [ =( singleton( x ), singleton( y ) ) ] )
% 2.20/2.55  , 0, substitution( 0, [] )).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  subsumption(
% 2.20/2.55  clause( 124, [ =( singleton( y ), singleton( x ) ) ] )
% 2.20/2.55  , clause( 17288, [ =( singleton( y ), singleton( x ) ) ] )
% 2.20/2.55  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  subsumption(
% 2.20/2.55  clause( 125, [ member( y, 'universal_class' ) ] )
% 2.20/2.55  , clause( 17116, [ member( y, 'universal_class' ) ] )
% 2.20/2.55  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  eqswap(
% 2.20/2.55  clause( 17441, [ ~( =( y, x ) ) ] )
% 2.20/2.55  , clause( 17117, [ ~( =( x, y ) ) ] )
% 2.20/2.55  , 0, substitution( 0, [] )).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  subsumption(
% 2.20/2.55  clause( 126, [ ~( =( y, x ) ) ] )
% 2.20/2.55  , clause( 17441, [ ~( =( y, x ) ) ] )
% 2.20/2.55  , substitution( 0, [] ), permutation( 0, [ ==>( 0, 0 )] ) ).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  eqswap(
% 2.20/2.55  clause( 17442, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 2.20/2.55  , clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.55  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y )] )).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  eqswap(
% 2.20/2.55  clause( 17443, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 2.20/2.55  , clause( 4, [ ~( =( X, Y ) ), subclass( X, Y ) ] )
% 2.20/2.55  , 0, substitution( 0, [ :=( X, X ), :=( Y, Y )] )).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  resolution(
% 2.20/2.55  clause( 17444, [ ~( subclass( Y, X ) ), =( X, Y ), ~( =( Y, X ) ) ] )
% 2.20/2.55  , clause( 5, [ ~( subclass( X, Y ) ), ~( subclass( Y, X ) ), =( X, Y ) ] )
% 2.20/2.55  , 0, clause( 17442, [ ~( =( Y, X ) ), subclass( X, Y ) ] )
% 2.20/2.55  , 1, substitution( 0, [ :=( X, X ), :=( Y, Y )] ), substitution( 1, [ :=( X
% 2.20/2.55    , X ), :=( Y, Y )] )).
% 2.20/2.55  
% 2.20/2.55  
% 2.20/2.55  resolution(
% 2.20/2.55  clause( 17446, [ =( Y, X ), ~( =( X, Y ) ), ~( =( Y, X ) ) ] )
% 2.20/2.55  , clauseCputime limit exceeded (core dumped)
%------------------------------------------------------------------------------