function [ a, b ] = p11_interval ( )

%*****************************************************************************80
%
%% p11_interval() returns a starting interval for optimization for test 11.
%
%  Licensing:
%
%    This code is distributed under the MIT license.
%
%  Modified:
%
%    23 February 2026
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    real A, B: the left and right endpoints of the interval.
%
  a = -0.9;
  b =  0.5;

  return
end
