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E45

[18Z]Note:un altro viceversa del [183].

Fissato \(IβŠ† ℝ\) intervallo e data \(f:I→ℝβˆͺ\{ ∞\} \) convessa e semicontinua inferiore, esistono successioni \(a_ n,b_ nβˆˆβ„\) tali che \(f(x)=\sup _ n (a_ n+b_ n x)\).

Soluzione 1

[190]

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