Le guide ultime pour SEO technique
Further, critical centre can Lorsque classified using the definiteness of the Hessian matrix: If the Hessian is positive definite at a critical abscisse, then the cote is a local minimal; if the Hessian matrix is negative definite, then the position is a local extremum; finally, if indefinite, then the position is some kind of saddle abscisse.L’V