2 * Equation 9.1.15 in Fletcher's book Practical Methods of
9 * True solution: x1=1/sqrt(2), x2=1/sqrt(2)
12 fmin_cobyla(-x1-x2, [x1, x2], [1, 1], constraints = [x2-x1^2 >= 0, 1-x1^2-x2^2 >= 0], iprint=1);
16 Normal return from subroutine COBYLA
18 NFVALS = 63 F =-1.414214E+00 MAXCV = 2.000067E-12
19 X = 7.071064E-01 7.071072E-01
20 [[x1 = .7071063653426506,x2 = .7071071970316142],-1.414213562374265,
26 Output from test problem 6 (Equation (9.1.15) in Fletcher)
28 Normal return from subroutine COBYLA
30 NFVALS = 63 F =-1.414214E+00 MAXCV = 2.000067E-12
31 X = 7.071064E-01 7.071072E-01