reduce-algebra/buglist/bug76

% Date:    Mon, 06 May 1996 16:55:36
% From:    "POPOWICZ Ziemowit" <ZIEMEK@proton.ift.uni.wroc.pl>

% Why is the result zero when the noncom2 package is loaded?

load_package noncom2;

operator d,fun;

noncom d,fun;

% implementation of Leibnitz rule

% d(1) denotes the differentations and fun the object

let { d(1)*fun(~f,~n) => fun(f,n+1) + fun(f,n)*d(1)};

result:=d(1)^2*fun(f,0)-d(1)*fun(f,0)^2;

end;