%--------------------------------------------------------------------------
% File     : COL028-1 : TPTP v9.0.0. Bugfixed v2.3.0.
% Domain   : Combinatory Logic
% Problem  : Weak fixed point for B and N
% Version  : [WM88] (equality) axioms.
% English  : The weak fixed point property holds for the set P consisting
%            of the combinators B and N, where ((Bx)y)z = x(yz), ((Nx)y)z
%            = ((xz)y)z.

% Refs     : [Smu85] Smullyan (1978), To Mock a Mocking Bird and Other Logi
%          : [MW87]  McCune & Wos (1987), A Case Study in Automated Theorem
%          : [WM88]  Wos & McCune (1988), Challenge Problems Focusing on Eq
%          : [MW88]  McCune & Wos (1988), Some Fixed Point Problems in Comb
% Source   : [MW88]
% Names    : - [MW88]

% Status   : Unsatisfiable
% Rating   : 0.00 v2.0.0
% Syntax   :

% Comments :
% Bugfixes : v2.3.0 - Removed. Duplicate of COL023-1.
%--------------------------------------------------------------------------