On the Cesàro and Riesz means of Fourier series
Compositio Mathematica, Volume 7 (1940), p. 112-122
@article{CM_1940__7__112_0,
     author = {Sz\'asz, Otto},
     title = {On the Ces\`aro and Riesz means of Fourier series},
     journal = {Compositio Mathematica},
     publisher = {Johnson Reprint Corporation},
     volume = {7},
     year = {1940},
     pages = {112-122},
     zbl = {0021.22003},
     language = {en},
     url = {http://www.numdam.org/item/CM_1940__7__112_0}
}
Szász, Otto. On the Cesàro and Riesz means of Fourier series. Compositio Mathematica, Volume 7 (1940) pp. 112-122. http://www.numdam.org/item/CM_1940__7__112_0/

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