function S=test20(x)
% Papageorgiou, 1996
%
% x0 = 2
% xo = 0.1429
% S(xo) = [1.0102 1.0102]'

S=4*(x-0.5).^2+0.5;

% [x,S,nS,lambda]=sqp('test20','restr20',2)
