The Hessian matrix: Eigenvalues, concavity, and curvature

www.iith.ac.in

Note that Theorem1.2says nothing about critical points. It’s valid anywhere fhas continuous second partial derivatives. Theorems1.1and1.2are ne, as far as they go, but they don’t go far enough for my tastes.

  Matrix, Curvature, Eigenvalue, Hessian, The hessian matrix, Concavity, And curvature