Talk:Real Function is Strictly Concave iff Derivative is Strictly Decreasing

Is an explicit proof needed as it is a direct consequence of this lemma applied to $-f$? Real Function is Strictly Convex iff Derivative is Strictly Increasing

--MattP (talk) 20:03, 20 March 2022 (UTC)


 * And so is Real Function is Strictly Convex iff Derivative is Strictly Increasing a direct consequence of this.


 * The best approach is of course a second proof added to both of these theorems showing that direct consequence in both cases. --prime mover (talk) 20:20, 20 March 2022 (UTC)