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On a lower bound of the second moment of the quadratic Schoenberg operator. (English) Zbl 1047.41008

Lupaş, Alexandru (ed.) et al., Mathematical analysis and approximation theory. Proceedings of the 5th Romanian–German seminar on approximation theory and its applications, RoGer, Sibiu, Romania, June 12–15, 2002. Sibiu: Burg Verlag (ISBN 973-85647-4-3). 37-44 (2002).
MSC:  41A15 41A36 41A25
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