Model hs56 Parameters a = asin(sqrt(1/4.2)) b = asin(sqrt(5/7.2)) c = asin(sqrt(4/7)) d = asin(sqrt(2/7)) xi[1:3] = 1 xi[4:6] = a xi[7] = b End Parameters Variables x[1:7] = xi[1:7], >= 0 obj End Variables Equations x[1] - 4.2*sin(x[4])^2 = 0 x[2] - 4.2*sin(x[5])^2 = 0 x[3] - 4.2*sin(x[6])^2 = 0 x[1] + 2*x[2] + 2*x[3] - 7.2*sin(x[7])^2 = 0 ! best known objective = -3.456 obj = -x[1]*x[2]*x[3] End Equations End Model