1/norm(v) is neither convex nor concave.
norm(v)^3 is convex. I’m not sure whether c1*norm(v)^3 + c2/norm(v) is convex for any positive values of c1 and c2, but it is not convex for all positive values of c1 and c2.
1/norm(v) is neither convex nor concave.
norm(v)^3 is convex. I’m not sure whether c1*norm(v)^3 + c2/norm(v) is convex for any positive values of c1 and c2, but it is not convex for all positive values of c1 and c2.