I just need a short reminder from Calculus. Suppose you have a linear functional [tex]\alpha[/tex] from C1[-1,1] to [tex]\Re[/tex], given by(adsbygoogle = window.adsbygoogle || []).push({});

[tex]\alpha(f) = \int_{-1}^{1}f(t)g(t)dt[/tex]

for some fixed continuous function g. What is [tex]\frac{d \alpha}{d f}[/tex]?

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# How to differentiate an integral?

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