Geodesic
Rate of approximation of functions by negative-order Césaro means of double orthogonal series
Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (2004), pp. 72-75 Cet article a éte moissonné depuis la source Math-Net.Ru

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@article{IVM_2004_2_a8,
     author = {L. G. Kovalenko},
     title = {Rate of approximation of functions by negative-order {C\'esaro} means of double orthogonal series},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {72--75},
     year = {2004},
     number = {2},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2004_2_a8/}
}
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L. G. Kovalenko. Rate of approximation of functions by negative-order Césaro means of double orthogonal series. Izvestiâ vysših učebnyh zavedenij. Matematika, no. 2 (2004), pp. 72-75. http://geodesic.mathdoc.fr/item/IVM_2004_2_a8/

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[2] Andrienko V. A., Kovalenko L. G., “Approksimativnye svoistva srednikh Chezaro dvoinykh ortogonalnykh ryadov”, Visnik Odesk. derzh. un-ta, 5:3 (2000), 5–11

[3] Andrienko V. A., “O summiruemosti ortogonalnykh ryadov metodami Chezaro otritsatelnogo poryadka”, Izv. vuzov. Matematika, 1988, no. 9, 3–10 | MR | Zbl