EDB — 1HB

[1HB] Prerequisites:[1F6]↺↻,[1GB]↺↻,[1H8]↺↻.Let $f,𝜑$ be of class $C^2$ in the open set $A$, and let $\bar{x}$ be a minimum point for $f$ constrained to $E_a$; let $𝜆$ be the Lagrange multiplier; let’s define $h=f(x)+𝜆𝜑(x)$, then

where $H$ is the Hessian matrix of $h$.