From[url=https://math.stackexchange.com/questions/620541/finding-extremum-values-in-a-given-function-using-hessian-matrix][br]https://math.stackexchange.com/questions/620541/finding-extremum-values-in-a-given-function-using-hessian-matrix[/url][br][url=https://math.stackexchange.com/questions/620541/finding-extremum-values-in-a-given-function-using-hessian-matrix]Finding extremum values in a given function using hessian matrix[/url]