Problem: Concave function of two variables
Problem
Show that f(x,y)=−x2−y2 is strictly concave.
Solution
H=()
|H|=4>0 and fxx″ for all x : f is strictly concave.
Problem
Show that f(x,y)=−x2−y2 is strictly concave.
Solution
H=()
|H|=4>0 and fxx″ for all x : f is strictly concave.