function alpha = p13_alpha ( )

%*****************************************************************************80
%
%% P13_ALPHA returns ALPHA for problem 13.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    29 July 2007
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Output, real ALPHA, the value of ALPHA.
%
  alpha = 0.0;

  return
end
