function f2 = p11_f2 ( x )

%*****************************************************************************80
%
%% P11_F2 evaluates the second derivative for problem 11.
%
%  Licensing:
%
%    This code is distributed under the GNU LGPL license.
%
%  Modified:
%
%    03 February 2012
%
%  Author:
%
%    John Burkardt
%
%  Parameters:
%
%    Input, real X, the values of the variables.
%
%    Output, real F2, the second derivative.
%
  f2 = 0.0;

  return
end
