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3. A well-known relation from Fourier analysis is the Plancherel theorem, which holds that L° 80756wdx= L* F*ck)F(k) dk Becau

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-1/K-ya f(x) = 1 F(x) e-ixx dk p* (m) = get e tixx dk If for fim dx = Sam Sp*r) for) e dvok DIV >*PM Jea) est duka = 1 L a

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