Further, critical points can be classified using the definiteness of the Hessian matrix: If the Hessian is certaine definite at a critical point, then the point is a local minimum; if the Hessian matrix is negative definite, then the point is a local comble; finally, if indefinite, then the abscisse https://juliuszqnhu.actoblog.com/29128845/la-règle-2-minutes-pour-signature-numérique