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Results tagged with fa.functional-analysis
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user 24208
Banach spaces, function spaces, real functions, integral transforms, theory of distributions, measure theory.
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Functional derivative of the square of an integral
I have the following functional
$$F(y)=\left[\int \frac{1}{y(x)+A}\cos(x)dx\right]^2$$
How do I find the functional derivative $dF$?
(I never encountered the square of an integral before when I did …
