Introduction: Just as for the optimization of functions of one variable, for the optimization of functions of two variables the stationary points are crucial.
Definition: Let z(x,y) be a function of two variables. A point (x,y) such that
Definition: Let z(x,y) be a function of two variables. A point (x,y) such that
- z′x(x,y)=0
- z′y(x,y)=0