Abstract
We prove the following propositions. An even integrable function whose Fourier coefficients form a convex sequence is absolutely continuous if and only if its Fourier series converges absolutely. If the function f(t)is convex on [0, π],f(t)=f(π—t), then for odd n while for even n, b0=0.
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More From: Mathematical Notes of the Academy of Sciences of the USSR
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