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Found 156 Documents (Results 1–100)

Inverse theorems on the approximation of periodic functions with high generalized smoothness. (English. Russian original) Zbl 1485.42003

Math. Notes 111, No. 2, 320-323 (2022); translation from Mat. Zametki 111, No. 2, 312-315 (2022).
MSC:  42A10 41A50 46E35
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Entropy and concentration. (English) Zbl 1484.60021

De Mari, Filippo (ed.) et al., Harmonic and applied analysis. From Radon transforms to machine learning. Based on contributions presented at the 2nd and 3rd summer schools on applied harmonic analysis, University of Genova, Genova, Italy, 2017 and 2019. Cham: Birkhäuser. Appl. Numer. Harmon. Anal., 55-100 (2021).
MSC:  60E15 60C05
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Extremal problems in polynomials and entire functions. (English) Zbl 1315.41005

Rassias, Themistocles M. (ed.), Handbook of functional equations. Functional inequalities. New York, NY: Springer (ISBN 978-1-4939-1245-2/hbk; 978-1-4939-1246-9/ebook). Springer Optimization and Its Applications 95, 209-245 (2014).
MSC:  41A17 30A10 26D07
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A necessary condition for the completeness of the system \(\{e^{-\lambda_n t}\mid\operatorname{Re}\lambda_n > 0\}\) in the spaces \(C _{0}(\mathbb R_{+})\) and \(L^p (\mathbb R_{+})\), \(p > 2\). (English. Russian original) Zbl 1170.46014

Math. Notes 83, No. 6, 759-769 (2008); translation from Mat. Zametki 83, No. 6, 831-842 (2008).
MSC:  46B15 46E30
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The cosine-factor modulus of smoothness. (English) Zbl 1067.41006

Guddat, Jürgen (ed.) et al., Parametric optimization and related topics VII. Selected papers of the international conference, Puebla, México, March 10–15, 2002. México: Sociedad Matemática Mexicana (ISBN 970-32-1877-6/pbk). Aportaciones Matemáticas: Investigación 18, 33-44 (2004).
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