Asymptotics of series arising from the approximation of periodic functions by Riesz and Cesàro means. (English. Russian original) Zbl 1268.41025
Math. Notes 93, No. 1, 58-68 (2013); translation from Mat. Zametki 93, No. 1, 45-55 (2013).
Reviewer: Lothar Berg (Rostock)