=+26.27. The Fourier-series analogue of the condition (26.19) is E ,, Ic ,, | < c. Show

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=+26.27. The Fourier-series analogue of the condition (26.19) is E„ ,, Ic ,, | <

c. Show that it implies u has density f(x) =(2m)="2"Cm,e-imx on [0,2m], where f is continuous and f(0) = f(2). This is the analogue of the inversion formula

(26.20).

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