International Conference "Approximation Theory and Applications" Dedicated to the 100th Anniversary S. B. Stechkin

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International Conference "Approximation Theory and Applications" Dedicated to the 100th Anniversary S. B. Stechkin
(September 5–11, 2021, Golden Ring Hotel, Moscow, Smolenskaya street, 5)

Financial support. The event is supported by the Government of the Russian Federation (the grant to the MSU Laboratory "High-dimensional approximation and applications"‎, Agreement no. 14.W03.31.0031), the Simons Foundation and the Ministry of Science and Higher Education of the Russian Federation (the grant to the Steklov International Mathematical Center, Agreement no. 075-15-2019-1614).

E-mail:
Website:	https://approx-lab.math.msu.su/sbs100.html

Program

Abstracts

Program Committee
Berdyshev Vitalii Ivanovich (Co-chairman)
Kashin Boris Sergeevich (Co-chairman)
Antonov Nikolai Yur'evich
Arestov Vitalii Vladimirovich
Besov Oleg Vladimirovich
Chernykh Nikolai Ivanovich
Ivanov Valerii Ivanovich
Kholshchevnikova Natal'ya Nikolaevna
Konyagin Sergei Vladimirovich
Sendov Blagovest Hristov
Shadrin Aleksey Yur'evich
Temlyakov Vladimir Nikolaevich
Tsar'kov Igor' Germanovich

Organizing Committee
Konyagin Sergei Vladimirovich (Co-chairman)
Temlyakov Vladimir Nikolaevich (Co-chairman)
Treschev Dmitry Valerevich (Co-chairman)
Malykhin Yuri Viatcheslavovich (Vice-chairman)
Goryainova Oksana Sergeevna (Executive Secretary)
Andreev Nikolai Nikolaevich
Gabdullin Mikhail Rashidovich
Kudryavtseva Olga Sergeevna
Podolskii Vladimir Evgen'evich
Ryutin Konstantin Sergeevich
Shadrin Aleksey Yur'evich
Solodov Aleksei Petrovich

Institutions
Steklov Mathematical Institute of Russian Academy of Sciences, Moscow
Steklov International Mathematical Center
Laboratory "Multidimensional Approximation and Applications", Lomonosov Moscow State University, Moscow


*International Conference "Approximation Theory and Applications" Dedicated to the 100th Anniversary S. B. Stechkin, Moscow, Smolenskaya street, 5, September 5–11, 2021*

	*September 6, 2021 (Mon)*

1.	Opening of the conference September 6, 2021 09:50–10:00, Moscow, Smolenskaya street, 5, Golden Ring Hotel


2.	On some papers of S. B. Stechkin S. V. Konyagin September 6, 2021 10:00–10:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


3.	Approximation Theory and S. B. Stechkin's works V. M. Tikhomirov September 6, 2021 11:00–11:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


4.	Sharp constants in the estimates of the sums of sine series with monotone convex coefficients A. Yu. Popov September 6, 2021 15:00–15:30, Moscow, Smolenskaya street, 5, Golden Ring Hotel


5.	Stability of minimization problems and the error bound conditions in the Hilbert space M. V. Balashov September 6, 2021 15:30–15:55, Moscow, Smolenskaya street, 5, Golden Ring Hotel


6.	On the rate of convergence of Fourier sums of continuous functions with constraints on the fractality of their graphs N. Yu. Antonov September 6, 2021 15:55–16:20, Moscow, Smolenskaya street, 5, Golden Ring Hotel


7.	Integer decomposition of elements of the spaces $L_p$ in Fourier type series on systems of contractions and shifts of one function V. I. Filippov September 6, 2021 16:20–16:45, Moscow, Smolenskaya street, 5, Golden Ring Hotel


8.	Uniqueness for rearrangements of the trigonometric system M. G. Plotnikov September 6, 2021 17:05–17:30, Moscow, Smolenskaya street, 5, Golden Ring Hotel


9.	Squares in a short interval is a $\Lambda_4$-set M. R. Gabdullin September 6, 2021 17:30–17:55, Moscow, Smolenskaya street, 5, Golden Ring Hotel


10.	Approximations on Classes of Poisson Integrals by Fourier-Chebyshev Rational Integral Operators P. G. Potseiko September 6, 2021 17:55–18:20, Moscow, Smolenskaya street, 5, Golden Ring Hotel


11.	Stechkin's problem on the classes of analytic functions R. R. Akopyan September 6, 2021 18:20–18:45, Moscow, Smolenskaya street, 5, Golden Ring Hotel


	*September 7, 2021 (Tue)*

12.	On stable reconstruction of analytic functions from selected Fourier samples A. Yu. Shadrin September 7, 2021 10:00–10:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


13.	S. B. Stechkin's inequalities in approximation theory: the key estimation and pairwise equivalency N. A. Ilyasov September 7, 2021 11:00–11:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


14.	Interpolation by rational functions: several intervals; several variables A. L. Lukashov September 7, 2021 12:30–13:20, Moscow, Smolenskaya street, 5, Golden Ring Hotel


15.	Existence and structure of universal functions in different sense M. G. Grigoryan September 7, 2021 15:00–15:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


16.	Application of subdivision schemes to a problem of number theory V. Yu. Protasov September 7, 2021 16:00–16:30, Moscow, Smolenskaya street, 5, Golden Ring Hotel


17.	Some results and problems in dyadic harmonic analysis B. I. Golubov September 7, 2021 16:30–16:55, Moscow, Smolenskaya street, 5, Golden Ring Hotel


18.	Wavelet approximation in Orlicz spaces M. A. Skopina September 7, 2021 17:15–17:40, Moscow, Smolenskaya street, 5, Golden Ring Hotel


19.	On Fourier series in orthogonal Sobolev's polynomials B. P. Osilenker September 7, 2021 17:40–18:05, Moscow, Smolenskaya street, 5, Golden Ring Hotel


20.	The asymptotic of the sums of cosine-series with fractionely monotone coefficients near the origin M. I. Dyachenko September 7, 2021 18:05–18:30, Moscow, Smolenskaya street, 5, Golden Ring Hotel


21.	Solving the Delsarte problems for spherical designs by the Arestov-Babenko method D. V. Gorbachev September 7, 2021 18:30–18:55, Moscow, Smolenskaya street, 5, Golden Ring Hotel


22.	Besov spaces with generalized smoothness and summability of multiple Fourier series S. Yu. Artamonov September 7, 2021 18:55–19:20, Moscow, Smolenskaya street, 5, Golden Ring Hotel


	*September 8, 2021 (Wed)*

23.	The movement of an object and an unfriendly observer V. I. Berdyshev September 8, 2021 10:00–10:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


24.	Fenton's sum of translates approach for classical minimax questions of approximation theory S. Révész September 8, 2021 11:00–11:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


25.	Approximation of invariant operators V. V. Arestov September 8, 2021 12:30–13:20, Moscow, Smolenskaya street, 5, Golden Ring Hotel


26.	Banach limits and applications E. M. Semenov September 8, 2021 14:30–15:00, Moscow, Smolenskaya street, 5, Golden Ring Hotel


27.	Approximating convex sets by simpler convex sets E. Kopecká September 8, 2021 15:00–15:30, Moscow, Smolenskaya street, 5, Golden Ring Hotel


28.	$k$-moothness of operators K. Paul September 8, 2021 15:30–15:55, Moscow, Smolenskaya street, 5, Golden Ring Hotel


29.	On some inequalities for multiplicative sequences of functions G. A. Karagulyan September 8, 2021 16:10–16:40, Moscow, Smolenskaya street, 5, Golden Ring Hotel


30.	Tight wavelet frames in zero dimensional groups S. F. Lukomskii September 8, 2021 16:40–17:05, Moscow, Smolenskaya street, 5, Golden Ring Hotel


31.	Translation invariant version of little Grothendieck theorem for Sobolev spaces K. Kazaniecki September 8, 2021 17:05–17:30, Moscow, Smolenskaya street, 5, Golden Ring Hotel


32.	The Haar basis in classical smoothness spaces G. Garrigós September 8, 2021 17:45–18:35, Moscow, Smolenskaya street, 5, Golden Ring Hotel


33.	Flat Littlewood polynomials exist J. Sahasrabudhe September 8, 2021 18:45–19:35, Moscow, Smolenskaya street, 5, Golden Ring Hotel


	*September 9, 2021 (Thu)*

34.	The Fatou property for general approximate identities on metric measure spaces V. G. Krotov September 9, 2021 10:00–10:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


35.	On some control problems and approximation of sets in these problems V. N. Ushakov September 9, 2021 11:00–11:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


36.	Caustics, Mach disks, application to astrophysics I. G. Tsar'kov September 9, 2021 12:30–13:20, Moscow, Smolenskaya street, 5, Golden Ring Hotel


37.	Existence and uniqueness of the nearest and farthest points of two subsets of a Banach space G. E. Ivanov September 9, 2021 15:00–15:30, Moscow, Smolenskaya street, 5, Golden Ring Hotel


38.	Some solar problems in $\max$- and $\min$-approximation A. R. Alimov September 9, 2021 15:30–16:00, Moscow, Smolenskaya street, 5, Golden Ring Hotel


39.	Construction of rectifiable curves in proximally smooth sets M. S. Lopushanski September 9, 2021 16:00–16:25, Moscow, Smolenskaya street, 5, Golden Ring Hotel


40.	On Chebyshev and monotone path-connected sets B. B. Bednov September 9, 2021 16:25–16:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


41.	Convex hull of a set in terms of metric projection K. S. Shklyaev September 9, 2021 17:10–17:35, Moscow, Smolenskaya street, 5, Golden Ring Hotel


42.	An example of a Banach space with non-Lipschitzian metric projection on any straight line L. Sh. Burusheva September 9, 2021 17:35–18:00, Moscow, Smolenskaya street, 5, Golden Ring Hotel


	*September 10, 2021 (Fri)*

43.	On the Fourier series and Fourier transforms R. M. Trigub September 10, 2021 10:00–10:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


44.	Weighted inequalities in Dunkl harmonic analysis V. I. Ivanov September 10, 2021 11:00–11:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


45.	Convergence of interpolation processes and conditionality of systems of equations for spline construction in the general problem of spline interpolation Yu. S. Volkov September 10, 2021 12:30–13:20, Moscow, Smolenskaya street, 5, Golden Ring Hotel


46.	On the optimal constants in the two-sided Stechkin inequalities T. Jahn September 10, 2021 13:20–13:45, Moscow, Smolenskaya street, 5, Golden Ring Hotel


47.	Uniqueness theorems for simple trigonometric series and its application to multiple series G. G. Gevorkyan September 10, 2021 14:30–15:20, Moscow, Smolenskaya street, 5, Golden Ring Hotel


48.	$S$-numbers of embeddings of weighted Wiener classes W. Sickel September 10, 2021 15:30–16:00, Moscow, Smolenskaya street, 5, Golden Ring Hotel


49.	Tree Based Tensor Networks (HT/TT) for the numerical solution of non-linear partial differential equations R. Schneider September 10, 2021 16:00–16:25, Moscow, Smolenskaya street, 5, Golden Ring Hotel


50.	Turán's inequality, inverse to Markov's inequality, for compact sets in the complex plane P. Yu. Glazyrina September 10, 2021 16:25–16:50, Moscow, Smolenskaya street, 5, Golden Ring Hotel


51.	Orthogonality and best approximations in Banach spaces D. Sain September 10, 2021 17:05–17:30, Moscow, Smolenskaya street, 5, Golden Ring Hotel


52.	Bhatia-Semrl Property of a bounded linear operator A. Ray September 10, 2021 17:30–17:55, Moscow, Smolenskaya street, 5, Golden Ring Hotel


53.	Strong proximinality in Banach spaces S. Gupta September 10, 2021 17:55–18:20, Moscow, Smolenskaya street, 5, Golden Ring Hotel


54.	Differentiability of distance function and the proximinal condition implying convexity T. Nath September 10, 2021 18:20–18:45, Moscow, Smolenskaya street, 5, Golden Ring Hotel

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