Geodesic
Approximation to the generating function by the Cesàro means of its ultraspherical series.
Bollettino della Unione matematica italiana, Série 3, Tome 17 (1962) no. 2, pp. 159-165.

Voir la notice de l'article provenant de la source Biblioteca Digitale Italiana di Matematica

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     title = {Approximation to the generating function by the {Ces\`aro} means of its  ultraspherical series.},
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Singhai, B. C. Approximation to the generating function by the Cesàro means of its  ultraspherical series.. Bollettino della Unione matematica italiana, Série 3, Tome 17 (1962) no. 2, pp. 159-165. http://geodesic.mathdoc.fr/item/BUMI_1962_3_17_2_a0/

[1] Kogbetliantz, E. , Recherches sur la sommabilité des séries ultrasphérique par la methode des moyennes arithmétiques, «Jour Math.», (9), 3, 1924, (107-187). | fulltext mini-dml | Jbk 50.0207.05

[2] Obrechkoff , Sur la sommation de la séries ultrasphérique par la methode des moyennes arithmetiques, «Rendiconti del Circolo Matematico di Palermo», 59, 1936. (266-287). | Jbk 61.1127.01

[3] Singhai, B. C. Cèsaro Summability of ultraspherical series, to appear shortly in «Annali di Matematica pura ed applicata.», (1961). | MR

[4] Singhai B. C. , Of the ultraspherical Series, in the press, «Bollettino dell'Unione Matematica Italiana», 1961. | fulltext bdim