TPTP Problem File: NUN061+1.p
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% File : NUN061+1 : TPTP v8.2.0. Released v7.3.0.
% Domain : Number Theory
% Problem : Robinson arithmetic: There exist infinite evens
% Version : Especial.
% English :
% Refs : [BBJ03] Boolos et al. (2003), Computability and Logic
% : [Smi07] Smith (2007), An Introduction to Goedel's Theorems
% : [Lam18] Lampert (2018), Email to Geoff Sutcliffe
% Source : [Lam18]
% Names : infiniteevensid [Lam18]
% Status : Theorem
% Rating : 1.00 v7.3.0
% Syntax : Number of formulae : 19 ( 1 unt; 0 def)
% Number of atoms : 91 ( 0 equ)
% Maximal formula atoms : 16 ( 4 avg)
% Number of connectives : 115 ( 43 ~; 34 |; 38 &)
% ( 0 <=>; 0 =>; 0 <=; 0 <~>)
% Maximal formula depth : 16 ( 8 avg)
% Maximal term depth : 1 ( 1 avg)
% Number of predicates : 5 ( 5 usr; 0 prp; 1-3 aty)
% Number of functors : 0 ( 0 usr; 0 con; --- aty)
% Number of variables : 85 ( 57 !; 28 ?)
% SPC : FOF_THM_RFO_NEQ
% Comments : Translated to FOL without equality.
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include('Axioms/NUM009+0.ax').
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fof(infiniteevensid,conjecture,
! [X1] :
( ! [X2] :
( ? [Y2,Y5] :
( ? [Y6] :
( id(Y6,X2)
& ? [Y12] :
( r4(Y12,Y2,Y6)
& ? [Y14] :
( r2(Y14,Y12)
& ? [Y16] :
( r1(Y16)
& r2(Y16,Y14) ) ) ) )
& ? [Y9] :
( id(Y9,X2)
& r3(Y2,Y5,Y9) ) )
& ? [Y3] :
! [Y8] :
( ~ id(Y8,X2)
| ~ r3(X1,Y3,Y8) ) )
| ! [Y1,Y4] :
( ! [Y10] :
( ~ id(Y10,X1)
| ~ r3(Y1,Y4,Y10) )
| ! [Y7] :
( ! [Y11] :
( ! [Y13] :
( ! [Y15] :
( ~ r1(Y15)
| ~ r2(Y15,Y13) )
| ~ r2(Y13,Y11) )
| ~ r4(Y11,Y1,Y7) )
| ~ id(Y7,X1) ) ) ) ).
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