SOME RESULTS ON L APPROXIMATION OF THE r-TH DERIVATE OF FOURIER SERIES
نویسندگان
چکیده
In this paper we obtain the conditions for L-convergence of the r-th derivatives of the cosine and sine trigonometric series. These results are extensions of corresponding Sidon’s and Telyakovskii’s theorems for trigonometric series (case: r = 0).
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