Convex function (Engelsk)
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Definition
A function f is called convex if f(tx+(1−t)y) ≤ tf(x)+(1−t)f(y) whenever x and y are in the domain of f, and t is in [0,1].
In other words if a straight line is drawn so as to cut off piece of the curve, the piece cut off will lie entirely below the line.
In other words if a straight line is drawn so as to cut off piece of the curve, the piece cut off will lie entirely below the line.
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