TPTP Problem File: SYN073+1.p
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% File : SYN073+1 : TPTP v8.2.0. Released v2.0.0.
% Domain : Syntactic
% Problem : Pelletier Problem 50
% Version : Especial.
% English :
% Refs : [Pel86] Pelletier (1986), Seventy-five Problems for Testing Au
% : [Hah94] Haehnle (1994), Email to G. Sutcliffe
% Source : [Hah94]
% Names : Pelletier 50 [Pel86]
% Status : Theorem
% Rating : 0.00 v6.3.0, 0.08 v6.2.0, 0.00 v5.5.0, 0.04 v5.3.0, 0.09 v5.2.0, 0.07 v5.0.0, 0.05 v4.1.0, 0.06 v4.0.1, 0.05 v3.7.0, 0.33 v3.5.0, 0.12 v3.4.0, 0.08 v3.3.0, 0.11 v3.1.0, 0.00 v2.5.0, 0.33 v2.4.0, 0.33 v2.2.1, 0.00 v2.1.0
% Syntax : Number of formulae : 1 ( 0 unt; 0 def)
% Number of atoms : 3 ( 0 equ)
% Maximal formula atoms : 3 ( 3 avg)
% Number of connectives : 2 ( 0 ~; 1 |; 0 &)
% ( 0 <=>; 1 =>; 0 <=; 0 <~>)
% Maximal formula depth : 5 ( 5 avg)
% Maximal term depth : 1 ( 1 avg)
% Number of predicates : 1 ( 1 usr; 0 prp; 2-2 aty)
% Number of functors : 1 ( 1 usr; 1 con; 0-0 aty)
% Number of variables : 4 ( 3 !; 1 ?)
% SPC : FOF_THM_RFO_NEQ
% Comments :
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fof(pel50,conjecture,
( ! [X] :
( big_f(a,X)
| ! [Y] : big_f(X,Y) )
=> ? [X1] :
! [Y1] : big_f(X1,Y1) ) ).
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