Difference between revisions of "Concave Function"
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| − | A concave function is the opposite of a [[convex function]], i.e. a function <math>f</math> is concave if and only if <math>-f</math> is convex. | + | A concave function is the opposite of a [[convex function]], i.e. a function <math>f</math> is concave if and only if <math>-f</math> is convex. |
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| + | A happy face is convex, while a sad face (like shiningsunnyday's) is concave. | ||
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Revision as of 21:39, 17 January 2016
A concave function is the opposite of a convex function, i.e. a function 
is concave if and only if 
is convex.
A happy face is convex, while a sad face (like shiningsunnyday's) is concave.
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