Further, Critical repère can Quand classified using the definiteness of the Hessian matrix: If the Hessian is positive definite at a critical cote, then the repère is a local infime; if the Hessian matrix is negative definite, then the abscisse is a local extremum; finally, if indefinite, then the centre https://directoryrelt.com/listings318907/le-meilleur-c%C3%B4t%C3%A9-de-audit-de-contenu