TPTP Problem File: RAL054^1.p
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% File : RAL054^1 : TPTP v8.2.0. Released v7.0.0.
% Domain : Real Algebra (Complex numbers and complex plane)
% Problem : Kyoto University, 2001, Humanities Course, Problem 1
% Version : [Mat16] axioms : Especial.
% English : When the equation x^4-x^3+x^2-(a + 2)x-a-3=0 in terms of the
% unknown number x has complex solutions on the imaginary axis,
% find all the real numbers a.
% Refs : [Mat16] Matsuzaki (2016), Email to Geoff Sutcliffe
% : [MI+16] Matsuzaki et al. (2016), Race against the Teens - Benc
% Source : [Mat16]
% Names : Univ-Kyoto-2001-Bun-1.p [Mat16]
% Status : Theorem
% Rating : ? v7.0.0
% Syntax : Number of formulae : 3485 ( 728 unt;1199 typ; 0 def)
% Number of atoms : 6527 (2210 equ; 0 cnn)
% Maximal formula atoms : 20 ( 2 avg)
% Number of connectives : 39630 ( 104 ~; 233 |;1174 &;35993 @)
% (1095 <=>;1031 =>; 0 <=; 0 <~>)
% Maximal formula depth : 33 ( 8 avg)
% Number arithmetic : 4473 ( 371 atm;1205 fun; 960 num;1937 var)
% Number of types : 40 ( 36 usr; 3 ari)
% Number of type conns : 2409 (2409 >; 0 *; 0 +; 0 <<)
% Number of symbols : 1214 (1171 usr; 68 con; 0-9 aty)
% Number of variables : 8059 ( 407 ^;7085 !; 431 ?;8059 :)
% ( 136 !>; 0 ?*; 0 @-; 0 @+)
% SPC : TH1_THM_EQU_ARI
% Comments : Theory: RCF; Author: Yiyang Zhan; Generated: 2014-04-08
% : Answer
% ^ [V_a_dot_0: $real] :
% ( ( V_a_dot_0
% = ( $uminus @ 3.0 ) )
% | ( V_a_dot_0
% = ( $sum @ ( $uminus @ 1.0 ) @ ( 'sqrt/1' @ 2.0 ) ) ) ) )
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include('Axioms/MAT001^0.ax').
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thf(p_qustion,conjecture,
( 'find/1' @ $real
@ ^ [V_a: $real] :
? [V_f: 'complex.Complex' > 'complex.Complex',V_x0: 'complex.Complex'] :
( ( V_f
= ( ^ [V_x: 'complex.Complex'] : ( 'complex.+/2' @ ( 'complex.^/2' @ V_x @ 4.0 ) @ ( 'complex.+/2' @ ( 'complex.-/1' @ ( 'complex.^/2' @ V_x @ 3.0 ) ) @ ( 'complex.+/2' @ ( 'complex.^/2' @ V_x @ 2.0 ) @ ( 'complex.+/2' @ ( 'complex.-/1' @ ( 'complex.*/2' @ ( 'complex.+/2' @ ( 'complex.real->complex/1' @ V_a ) @ ( 'complex.complex/2' @ 2.0 @ 0.0 ) ) @ V_x ) ) @ ( 'complex.+/2' @ ( 'complex.real->complex/1' @ ( $uminus @ V_a ) ) @ ( 'complex.complex/2' @ ( $uminus @ 3.0 ) @ 0.0 ) ) ) ) ) ) ) )
& ( 'complex.is-purely-imaginary/1' @ V_x0 )
& ( ( V_f @ V_x0 )
= ( 'complex.complex/2' @ 0.0 @ 0.0 ) ) ) ) ).
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