Definition:Concave Real Function

Definition
Let $f$ be a real function which is defined on a real interval $I$.

Also known as
A concave function can also be referred to as:
 * a concave down function
 * a convex up function

Also see

 * Equivalence of Definitions of Concave Real Function


 * Definition:Strictly Concave Real Function


 * Definition:Convex Real Function
 * Definition:Strictly Convex Real Function


 * Real Function is Concave iff its Negative is Convex