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Found 723 Documents (Results 1–100)

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\(d\)-modified Riesz potentials on central Campanato spaces. (English) Zbl 1479.42063

Bastos, M. Amélia (ed.) et al., Operator theory, functional analysis and applications. Proceedings of the 30th international workshop on operator theory and its applications, IWOTA 2019, Lisbon, Portugal, July 22–26, 2019. Cham: Birkhäuser. Oper. Theory: Adv. Appl. 282, 423-439 (2021).
Reviewer: The Anh Bui (Ryde)
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Lavrentiev gap for some classes of generalized Orlicz functions. (English) Zbl 07335766

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Approximation of functions of a complex variable by Fourier sums in orthogonal systems in \(L_2\). (English. Russian original) Zbl 1462.41004

Russ. Math. 64, No. 6, 56-62 (2020); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2020, No. 6, 65-72 (2020).
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On the estimates of the values of various widths of classes of functions of two variables in the weight space \(L_{2, \gamma } ( \mathbb{R}^2)\), \(\gamma = \exp ( - x^2 - y^2)\). (English. Ukrainian original) Zbl 1462.46031

J. Math. Sci., New York 248, No. 2, 217-232 (2020); translation from Ukr. Mat. Visn. 17, No. 1, 94-102 (2020).
MSC:  46E30 41A46
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Introduction to variational methods. (Introdução aos métodos variacionais.) (Portuguese) Zbl 1429.49001

Notas em Matemática Aplicada 87. São Carlos: Sociedade Brasileira de Matemática Aplicada e Computacional (ISBN 978-85-8215-088-7; 978-85-8215-087-0/ebook). xiii, 83 p., open access (2019).
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