A note on absolute Cesàro summability of Fourier series
A note on absolute Cesàro summability of Fourier series
1. Let f(x) be an integrable function in Lebesgue sense, and periodic of period 2π, and let 1 /(.r)~-^2-tfo +2^(α Λ cos n x + b n sin n x),where a > -1, and An = .\ τι DEFINITION 1.If a > -1, and then the Fourier series of /(ί) …