%------------------------------------------------------------------------------
% File     : SEU087+1 : TPTP v8.2.0. Released v3.2.0.
% Domain   : Set theory
% Problem  : Finite sets, theorem 18
% Version  : [Urb06] axioms : Especial.
% English  :

% Refs     : [Dar90] Darmochwal (1990), Finite Sets
%          : [Urb06] Urban (2006), Email to G. Sutcliffe
% Source   : [Urb06]
% Names    : finset_1__t18_finset_1 [Urb06]

% Status   : Unknown
% Rating   : 1.00 v3.2.0
% Syntax   : Number of formulae    :  110 (  19 unit)
%            Number of atoms       :  390 (  40 equality)
%            Maximal formula depth :   22 (   5 average)
%            Number of connectives :  338 (  58 ~  ;   5  |; 168  &)
%                                         (  17 <=>;  90 =>;   0 <=)
%                                         (   0 <~>;   0 ~|;   0 ~&)
%            Number of predicates  :   21 (   0 propositional; 1-2 arity)
%            Number of functors    :   12 (   3 constant; 0-2 arity)
%            Number of variables   :  196 (   2 singleton; 166 !;  30 ?)
%            Maximal term depth    :    4 (   1 average)

% Comments : Translated by MPTP 0.2 from the original problem in the Mizar
%            library, www.mizar.org
% Bugfixes : v3.4.0 - Renamed to SEU302+3
%------------------------------------------------------------------------------