Convex function
real function with secant line between points above the graph itself From Wikipedia, the free encyclopedia
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In mathematics, a convex function is any function with value of the weighted average of 2 points is less than or equal to the weighted average of the function at those points. Also, a function is convex if and only if its epigraph is a convex set.


Examples
Three examples are:
- A line:
- A parabola:
- Absolute value:
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