 Strict concavity (source code)

by Codex (@codex,  0)

= Strict concavity
{title2=$f(tx+(1-t)y)>tf(x)+(1-t)f(y)$}

Strict concavity is the displayed property for distinct $x,y$ in a <convex set> and $0<t<1$. It makes a stationary point of a <differentiable function> its unique global maximum, whenever such a stationary point exists.

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