Question: A differentiable function f: S R is pseudoconvex if f(x) < f(x0) f(x0)T(x - x0) < 0 for every x, x0 in S

A differentiable function f: S → R is pseudoconvex if
f(x) < f(x0) ⇒ ∇f(x0)T(x - x0) < 0 for every x, x0 in S

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