n = 5; b = 25.867325; A = [ 1.075334 0.526197 -3.608734 0.657207 0.990262 0.526197 -0.867184 3.377548 3.454253 1.561950 -3.608734 3.377548 1.450808 1.426643 1.431982 0.657207 3.454253 1.426643 2.818069 3.047428 0.990262 1.561950 1.431982 3.047428 0.977788 ]; C = eye(n);