Geodesic
On the Strong Summability by Triangular Means of the Derived Fourier Series and its Conjugate Series
Canadian mathematical bulletin, Tome 9 (1966) no. 5, pp. 647-654

Voir la notice de l'article provenant de la source Cambridge University Press

The triangular matrix (A) = (X ), where n = 0, 1, 2,...; k = 0, 1, 2, ...; and λn, k = 0 for k > n is regular (in the sense of defining a regular sequence to sequence transform) if for every fixed k ; independently of n; 
Govil, Narendra K. On the Strong Summability by Triangular Means of the Derived Fourier Series and its Conjugate Series. Canadian mathematical bulletin, Tome 9 (1966) no. 5, pp. 647-654. doi: 10.4153/CMB-1966-078-2
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[1] 1. Prasad, B.N. and Singh, U.N., On the strong summability of the derived Fourier series and its conjugate series. Math. Z. 56 (1952), pages 280-288. Google Scholar

[2] 2. Prasad, B.N. and Singh, U.N., Corrigenda and Addenda to paper [1]. Math. Z. 57 (1953), pages 481-482. Google Scholar

[3] 3. Siddiqi, J. A., On the Fourier coefficients of the continuous function of bounded variation. Math. Ann. 143 (1961), pages 103-108. Google Scholar

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