function title = p18_title ( dummy )

%% P18_TITLE returns the title of problem 18.
%
%  Modified:
%
%    09 April 2007
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Output, string TITLE, the title of the problem.
%
  title = 'f(x,y) = log ( x + y )';