Wu, Shengwei; Zhao, Jiarui; Xu, Yanyan; Chen, Guanggui; Cheng, Na The Chebyshev set problem in Riesz space. (English) Zbl 07525264 J. Funct. Spaces 2022, Article ID 4343472, 8 p. (2022). MSC: 41-XX 41A50 46A40 PDF BibTeX XML Cite \textit{S. Wu} et al., J. Funct. Spaces 2022, Article ID 4343472, 8 p. (2022; Zbl 07525264) Full Text: DOI OpenURL
Bouhlal, A.; Safouane, N.; Belkhadir, A.; Daher, R. Equivalence between K-functionals and modulus of smoothness on the quaternion algebra. (English) Zbl 07517793 Ann. Univ. Ferrara, Sez. VII, Sci. Mat. 68, No. 1, 79-89 (2022). MSC: 42A38 42B10 42C40 11R52 41A50 PDF BibTeX XML Cite \textit{A. Bouhlal} et al., Ann. Univ. Ferrara, Sez. VII, Sci. Mat. 68, No. 1, 79--89 (2022; Zbl 07517793) Full Text: DOI OpenURL
Carrijo, A. O.; Jordão, T.; Santos, C. Inequalities for moduli of smoothness on two-point homogeneous spaces. (English) Zbl 07513930 Positivity 26, No. 3, Paper No. 41, 16 p. (2022). MSC: 42A16 46E35 41A60 41A50 PDF BibTeX XML Cite \textit{A. O. Carrijo} et al., Positivity 26, No. 3, Paper No. 41, 16 p. (2022; Zbl 07513930) Full Text: DOI OpenURL
Fang, Quanlei; Xia, Jingbo Best approximations in a class of Lorentz ideals. (English) Zbl 07511281 Complex Anal. Oper. Theory 16, No. 4, Paper No. 51, 25 p. (2022). MSC: 41A50 47B10 47B35 PDF BibTeX XML Cite \textit{Q. Fang} and \textit{J. Xia}, Complex Anal. Oper. Theory 16, No. 4, Paper No. 51, 25 p. (2022; Zbl 07511281) Full Text: DOI OpenURL
Shevaldin, V. T. Extremal interpolation with the least value of the norm of the second derivative in \(L_p(\mathbb{R})\). (English. Russian original) Zbl 07503384 Izv. Math. 86, No. 1, 203-219 (2022); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 86, No. 1, 219-236 (2022). Reviewer: Martin D. Buhmann (Gießen) MSC: 41A05 41A15 41A50 65D07 PDF BibTeX XML Cite \textit{V. T. Shevaldin}, Izv. Math. 86, No. 1, 203--219 (2022; Zbl 07503384); translation from Izv. Ross. Akad. Nauk, Ser. Mat. 86, No. 1, 219--236 (2022) Full Text: DOI OpenURL
Tsarkov, I. G. Uniformly and locally convex asymmetric spaces. (English) Zbl 07500890 Russ. J. Math. Phys. 29, No. 1, 141-148 (2022). MSC: 46B99 41A65 54C65 46B20 41A50 54C60 PDF BibTeX XML Cite \textit{I. G. Tsarkov}, Russ. J. Math. Phys. 29, No. 1, 141--148 (2022; Zbl 07500890) Full Text: DOI OpenURL
Balashov, Maxim V. Approximate calculation of the Chebyshev center for a convex compact set in \(\mathbb{R}^n\). (English) Zbl 07499213 J. Convex Anal. 29, No. 1, 157-164 (2022). Reviewer: Sorin-Mihai Grad (Paris) MSC: 52A20 90C05 41A50 PDF BibTeX XML Cite \textit{M. V. Balashov}, J. Convex Anal. 29, No. 1, 157--164 (2022; Zbl 07499213) Full Text: Link OpenURL
Díaz-González, Abel; Pijeira-Cabrera, Héctor; Quintero-Roba, Javier Polynomials of least deviation from zero in Sobolev \(p\)-norm. (English) Zbl 07493947 Bull. Malays. Math. Sci. Soc. (2) 45, No. 2, 889-912 (2022). Reviewer: Marcel G. de Bruin (Heemstede) MSC: 30C10 30C15 33C47 41A10 41A50 41A52 46E35 PDF BibTeX XML Cite \textit{A. Díaz-González} et al., Bull. Malays. Math. Sci. Soc. (2) 45, No. 2, 889--912 (2022; Zbl 07493947) Full Text: DOI arXiv OpenURL
Lim, Lek-Heng; Michałek, Mateusz; Qi, Yang Best \(k\)-layer neural network approximations. (English) Zbl 07493726 Constr. Approx. 55, No. 1, 583-604 (2022). MSC: 68-XX 41A50 41A30 PDF BibTeX XML Cite \textit{L.-H. Lim} et al., Constr. Approx. 55, No. 1, 583--604 (2022; Zbl 07493726) Full Text: DOI arXiv OpenURL
Romanyuk, A. S.; Yanchenko, S. Ya. Estimates of approximating characteristics and the properties of the operators of best approximation for the classes of periodic functions in the space \(B_{1,1}\). (English. Ukrainian original) Zbl 07491010 Ukr. Math. J. 73, No. 8, 1278-1298 (2022); translation from Ukr. Mat. Zh. 73, No. 8, 1102-1119 (2021). MSC: 41A50 41A35 41A46 42B35 46E35 PDF BibTeX XML Cite \textit{A. S. Romanyuk} and \textit{S. Ya. Yanchenko}, Ukr. Math. J. 73, No. 8, 1278--1298 (2022; Zbl 07491010); translation from Ukr. Mat. Zh. 73, No. 8, 1102--1119 (2021) Full Text: DOI OpenURL
Runovskii, K. V.; Laktionova, N. V. Inverse theorems on the approximation of periodic functions with high generalized smoothness. (English. Russian original) Zbl 07488510 Math. Notes 111, No. 2, 320-323 (2022); translation from Mat. Zametki 111, No. 2, 312-315 (2022). Reviewer: Włodzimierz Łenski (Poznań) MSC: 42A10 41A50 46E35 PDF BibTeX XML Cite \textit{K. V. Runovskii} and \textit{N. V. Laktionova}, Math. Notes 111, No. 2, 320--323 (2022; Zbl 07488510); translation from Mat. Zametki 111, No. 2, 312--315 (2022) Full Text: DOI OpenURL
Dragnev, P. D.; Legg, A. R.; Orive, R. On the best uniform polynomial approximation to the checkmark function. (English) Zbl 07480976 J. Approx. Theory 275, Article ID 105698, 17 p. (2022). MSC: 41-XX 42-XX 41A10 41A50 PDF BibTeX XML Cite \textit{P. D. Dragnev} et al., J. Approx. Theory 275, Article ID 105698, 17 p. (2022; Zbl 07480976) Full Text: DOI arXiv OpenURL
Zhang, Xiaolong; Boyd, John P. Exact solutions to a nonlinear partial differential equation: the Product-of-Curvatures Poisson \((u_{x x} u_{y y} = 1)\). (English) Zbl 07472414 J. Comput. Appl. Math. 406, Article ID 113866, 18 p. (2022). MSC: 33F05 42A10 41A50 PDF BibTeX XML Cite \textit{X. Zhang} and \textit{J. P. Boyd}, J. Comput. Appl. Math. 406, Article ID 113866, 18 p. (2022; Zbl 07472414) Full Text: DOI OpenURL
Bencheikh, O.; Jourdain, B. Approximation rate in Wasserstein distance of probability measures on the real line by deterministic empirical measures. (English) Zbl 1481.60007 J. Approx. Theory 274, Article ID 105684, 27 p. (2022). MSC: 60B10 60-08 28A33 62E17 41A25 41A50 41A29 PDF BibTeX XML Cite \textit{O. Bencheikh} and \textit{B. Jourdain}, J. Approx. Theory 274, Article ID 105684, 27 p. (2022; Zbl 1481.60007) Full Text: DOI arXiv OpenURL
Herrmann, Lukas; Opschoor, Joost A. A.; Schwab, Christoph Constructive deep ReLU neural network approximation. (English) Zbl 07458301 J. Sci. Comput. 90, No. 2, Paper No. 75, 37 p. (2022). MSC: 41A10 41A50 65D05 65D15 PDF BibTeX XML Cite \textit{L. Herrmann} et al., J. Sci. Comput. 90, No. 2, Paper No. 75, 37 p. (2022; Zbl 07458301) Full Text: DOI OpenURL
Ismailov, Vugar E. Ridge functions and applications in neural networks. (English) Zbl 07498870 Mathematical Surveys and Monographs 263. Providence, RI: American Mathematical Society (AMS) (ISBN 978-1-4704-6765-4/pbk; 978-1-4704-6800-2/ebook). ix, 186 p. (2021). Reviewer: Bilal Bilalov (Baku) MSC: 26-02 26B40 39B22 41A30 41A50 41A63 92-01 92B20 PDF BibTeX XML Cite \textit{V. E. Ismailov}, Ridge functions and applications in neural networks. Providence, RI: American Mathematical Society (AMS) (2021; Zbl 07498870) Full Text: DOI OpenURL
Akolade, M. T.; Idowu, A. S.; Falodun, B. O.; Abubakar, J. U. The paradox of heat conduction, influence of variable viscosity, and thermal conductivity on magnetized dissipative Casson fluid with stratification models. (English) Zbl 07493308 Proyecciones 40, No. 6, 1657-1682 (2021). MSC: 80A19 76A05 76W05 76D50 35A15 65L60 41A50 35A15 35Q79 35Q35 PDF BibTeX XML Cite \textit{M. T. Akolade} et al., Proyecciones 40, No. 6, 1657--1682 (2021; Zbl 07493308) Full Text: DOI OpenURL
Ricceri, Biagio An improvement of a saddle point theorem and some of its applications. (English) Zbl 07483228 J. Nonlinear Convex Anal. 22, No. 11, 2433-2439 (2021). MSC: 49J40 41A50 47J20 49J35 PDF BibTeX XML Cite \textit{B. Ricceri}, J. Nonlinear Convex Anal. 22, No. 11, 2433--2439 (2021; Zbl 07483228) Full Text: arXiv Link OpenURL
Yanchenko, S. Ya.; Radchenko, O. Ya. Approximation characteristics of the isotropic Nikol’skii-Besov functional classes. (English) Zbl 07482118 Carpathian Math. Publ. 13, No. 3, 851-861 (2021). MSC: 41A30 41A50 41A63 42A38 PDF BibTeX XML Cite \textit{S. Ya. Yanchenko} and \textit{O. Ya. Radchenko}, Carpathian Math. Publ. 13, No. 3, 851--861 (2021; Zbl 07482118) Full Text: DOI OpenURL
Balestro, Vitor; Martini, Horst; Teixeira, Ralph Convex analysis in normed spaces and metric projections onto convex bodies. (English) Zbl 07470576 J. Convex Anal. 28, No. 4, 1223-1248 (2021). Reviewer: T. D. Narang (Amritsar) MSC: 41A50 41A65 46B20 46G05 52A20 52A21 53C23 58C20 PDF BibTeX XML Cite \textit{V. Balestro} et al., J. Convex Anal. 28, No. 4, 1223--1248 (2021; Zbl 07470576) Full Text: arXiv Link OpenURL
Jayanarayanan, C. R.; Rao, T. S. S. R. K. Structure of sets of strong subdifferentiability in dual \(L^1\)-spaces. (English) Zbl 07470567 J. Convex Anal. 28, No. 4, 1087-1096 (2021). MSC: 41A65 46B20 41A50 46E15 PDF BibTeX XML Cite \textit{C. R. Jayanarayanan} and \textit{T. S. S. R. K. Rao}, J. Convex Anal. 28, No. 4, 1087--1096 (2021; Zbl 07470567) Full Text: arXiv Link OpenURL
Ouyang, Hui Projecting onto intersections of halfspaces and hyperplanes. (English) Zbl 07470562 J. Convex Anal. 28, No. 3, 983-1014 (2021). MSC: 47N10 41A50 65K10 65K05 90C25 90C90 PDF BibTeX XML Cite \textit{H. Ouyang}, J. Convex Anal. 28, No. 3, 983--1014 (2021; Zbl 07470562) Full Text: arXiv Link OpenURL
Elías-Zúñiga, Alex; Palacios-Pineda, Luis Manuel; Jiménez-Cedeño, Isaac H.; Martínez-Romero, Oscar; Olvera Trejo, Daniel Equivalent power-form representation of the fractal Toda oscillator. (English) Zbl 1481.78022 Fractals 29, No. 2, Article ID 2150034, 10 p. (2021). MSC: 78A60 65L06 41A50 26A33 PDF BibTeX XML Cite \textit{A. Elías-Zúñiga} et al., Fractals 29, No. 2, Article ID 2150034, 10 p. (2021; Zbl 1481.78022) Full Text: DOI OpenURL
Eichinger, B.; Yuditskii, P. Pointwise Remez inequality. (English) Zbl 07458663 Constr. Approx. 54, No. 3, 529-554 (2021). MSC: 41A17 41A44 30C35 41A50 PDF BibTeX XML Cite \textit{B. Eichinger} and \textit{P. Yuditskii}, Constr. Approx. 54, No. 3, 529--554 (2021; Zbl 07458663) Full Text: DOI arXiv OpenURL
Serdyuk, Anatoly S.; Stepanyuk, Tetiana A. About Lebesgue inequalities on the classes of generalized Poisson integrals. (English) Zbl 1482.42004 Jaen J. Approx. 12, 25-40 (2021). Reviewer: Włodzimierz Łenski (Poznań) MSC: 42A10 42B35 42A05 41A17 41A50 PDF BibTeX XML Cite \textit{A. S. Serdyuk} and \textit{T. A. Stepanyuk}, Jaen J. Approx. 12, 25--40 (2021; Zbl 1482.42004) Full Text: arXiv Link OpenURL
Novello, Galen; Schiefermayr, Klaus; Zinchenko, Maxim Weighted Chebyshev polynomials on compact subsets of the complex plane. (English) Zbl 1483.30023 Gesztesy, Fritz (ed.) et al., From operator theory to orthogonal polynomials, combinatorics, and number theory. A volume in honor of Lance Littlejohn’s 70th birthday. Cham: Birkhäuser. Oper. Theory: Adv. Appl. 285, 357-370 (2021). MSC: 30C10 30E10 41A50 PDF BibTeX XML Cite \textit{G. Novello} et al., Oper. Theory: Adv. Appl. 285, 357--370 (2021; Zbl 1483.30023) Full Text: DOI OpenURL
Kalyani, K.; Seshagiri Rao, N.; Mitiku, Belay On fixed point theorems of monotone functions in ordered metric spaces. (English) Zbl 07452026 J. Anal. 29, No. 4, 1237-1250 (2021). MSC: 41A50 47H10 26A42 46T99 PDF BibTeX XML Cite \textit{K. Kalyani} et al., J. Anal. 29, No. 4, 1237--1250 (2021; Zbl 07452026) Full Text: DOI OpenURL
Damelin, Steven B.; Ragozin, David L.; Werman, Michael On min-max affine approximants of convex or concave real-valued functions from \(\mathbb{R}^k\), Chebyshev equioscillation and graphics. (English) Zbl 07451979 Hirn, Matthew (ed.) et al., Excursions in harmonic analysis, Volume 6. In honor of John Benedetto’s 80th birthday. Cham: Birkhäuser. Appl. Numer. Harmon. Anal., 373-383 (2021). MSC: 41A50 90C90 PDF BibTeX XML Cite \textit{S. B. Damelin} et al., in: Excursions in harmonic analysis, Volume 6. In honor of John Benedetto's 80th birthday. Cham: Birkhäuser. 373--383 (2021; Zbl 07451979) Full Text: DOI arXiv OpenURL
Kumar, Kotapally Harish; Jiwari, Ram A note on numerical solution of classical Darboux problem. (English) Zbl 1478.65097 Math. Methods Appl. Sci. 44, No. 17, 12998-13007 (2021). MSC: 65M70 65T60 41A50 35L10 35Q05 PDF BibTeX XML Cite \textit{K. H. Kumar} and \textit{R. Jiwari}, Math. Methods Appl. Sci. 44, No. 17, 12998--13007 (2021; Zbl 1478.65097) Full Text: DOI OpenURL
Krasniqi, Xh. Z. Applications of the deferred de la Vallée Poussin means of Fourier series. (English) Zbl 1478.42003 Asian-Eur. J. Math. 14, No. 10, Article ID 2150179, 13 p. (2021). MSC: 42A24 42A10 42A20 42A16 41A50 PDF BibTeX XML Cite \textit{Xh. Z. Krasniqi}, Asian-Eur. J. Math. 14, No. 10, Article ID 2150179, 13 p. (2021; Zbl 1478.42003) Full Text: DOI OpenURL
Rao, T. S. S. R. K. Operators Birkhoff-James orthogonal to spaces of operators. (English) Zbl 07431317 Numer. Funct. Anal. Optim. 42, No. 10, 1201-1208 (2021). MSC: 47L05 41A50 46B28 46B25 PDF BibTeX XML Cite \textit{T. S. S. R. K. Rao}, Numer. Funct. Anal. Optim. 42, No. 10, 1201--1208 (2021; Zbl 07431317) Full Text: DOI OpenURL
Bauschke, Heinz H.; Ouyang, Hui; Wang, Xianfu On circumcenter mappings induced by nonexpansive operators. (English) Zbl 07420149 Pure Appl. Funct. Anal. 6, No. 2, 257-288 (2021). MSC: 47H09 47H04 41A50 90C25 PDF BibTeX XML Cite \textit{H. H. Bauschke} et al., Pure Appl. Funct. Anal. 6, No. 2, 257--288 (2021; Zbl 07420149) Full Text: arXiv Link OpenURL
Heisenberg, Lavinia; Bartelmann, Matthias; Brandenberger, Robert; Refregier, Alexandre Model independent analysis of supernova data, dark energy, trans-Planckian censorship and the swampland. (English) Zbl 1476.85002 Phys. Lett., B 812, Article ID 135990, 9 p. (2021). MSC: 85A15 83C56 83C75 83E05 41A50 83F05 PDF BibTeX XML Cite \textit{L. Heisenberg} et al., Phys. Lett., B 812, Article ID 135990, 9 p. (2021; Zbl 1476.85002) Full Text: DOI arXiv OpenURL
Kopaliani, Tengiz; Samashvili, Nino; Zviadadze, Shalva Extension of the best polynomial approximation operator in Musielak-Orlicz spaces. (English) Zbl 07393055 Publ. Math. 99, No. 1-2, 101-115 (2021). Reviewer: Ioan Raşa (Cluj-Napoca) MSC: 41A10 41A50 41A52 PDF BibTeX XML Cite \textit{T. Kopaliani} et al., Publ. Math. 99, No. 1--2, 101--115 (2021; Zbl 07393055) Full Text: DOI OpenURL
Grover, Priyanka; Singla, Sushil Birkhoff-James orthogonality and applications: a survey. (English) Zbl 1482.46017 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, 293-315 (2021). Reviewer: Kallol Paul (Kolkata) MSC: 46B20 46L05 46L08 47B47 41A50 PDF BibTeX XML Cite \textit{P. Grover} and \textit{S. Singla}, Oper. Theory: Adv. Appl. 282, 293--315 (2021; Zbl 1482.46017) Full Text: DOI arXiv OpenURL
Qu, Wei; Qian, Tao; Deng, Guan-Tie A stochastic sparse representation: \(n\)-best approximation to random signals and computation. (English) Zbl 1471.94012 Appl. Comput. Harmon. Anal. 55, 185-198 (2021). MSC: 94A12 41A30 41A50 30B99 60G35 60G07 60G10 94A08 PDF BibTeX XML Cite \textit{W. Qu} et al., Appl. Comput. Harmon. Anal. 55, 185--198 (2021; Zbl 1471.94012) Full Text: DOI OpenURL
Jahn, Thomas; Richter, Christian Coproximinality of linear subspaces in generalized Minkowski spaces. (English) Zbl 1481.41016 J. Math. Anal. Appl. 504, No. 1, Article ID 125351, 10 p. (2021). Reviewer: Francisco Pérez Acosta (La Laguna) MSC: 41A50 51B20 PDF BibTeX XML Cite \textit{T. Jahn} and \textit{C. Richter}, J. Math. Anal. Appl. 504, No. 1, Article ID 125351, 10 p. (2021; Zbl 1481.41016) Full Text: DOI arXiv OpenURL
Jiang, Bing; Ye, Peixin Efficiency of the weak rescaled pure greedy algorithm. (English) Zbl 1478.41010 Int. J. Wavelets Multiresolut. Inf. Process. 19, No. 4, Article ID 2150001, 20 p. (2021). Reviewer: Stefan Cobzaş (Cluj-Napoca) MSC: 41A65 41A46 41A50 94A08 94A15 PDF BibTeX XML Cite \textit{B. Jiang} and \textit{P. Ye}, Int. J. Wavelets Multiresolut. Inf. Process. 19, No. 4, Article ID 2150001, 20 p. (2021; Zbl 1478.41010) Full Text: DOI OpenURL
Bakhtiari, Hassan; Mohebi, Hossein Lagrange multiplier characterizations of constrained best approximation with infinite constraints. (English) Zbl 1475.90118 J. Optim. Theory Appl. 189, No. 3, 814-835 (2021). MSC: 90C34 41A29 41A50 90C26 90C46 PDF BibTeX XML Cite \textit{H. Bakhtiari} and \textit{H. Mohebi}, J. Optim. Theory Appl. 189, No. 3, 814--835 (2021; Zbl 1475.90118) Full Text: DOI OpenURL
Serdyuk, A. S.; Hrabova, U. Z. Order estimates of the uniform approximations by Zygmund sums on the classes of convolutions of periodic functions. (English) Zbl 1476.41014 Carpathian Math. Publ. 13, No. 1, 68-80 (2021). Reviewer: Sumit Chandok (Patiala) MSC: 41A46 41A50 PDF BibTeX XML Cite \textit{A. S. Serdyuk} and \textit{U. Z. Hrabova}, Carpathian Math. Publ. 13, No. 1, 68--80 (2021; Zbl 1476.41014) Full Text: DOI arXiv OpenURL
Semisalov, B. V.; Grebenev, V. N.; Medvedev, S. B.; Nazarenko, S. V. Numerical analysis of a self-similar turbulent flow in Bose-Einstein condensates. (English) Zbl 1476.35208 Commun. Nonlinear Sci. Numer. Simul. 102, Article ID 105903, 23 p. (2021). MSC: 35Q35 76F55 35C06 35B40 35B44 35P30 41A50 82C10 35R09 65N25 PDF BibTeX XML Cite \textit{B. V. Semisalov} et al., Commun. Nonlinear Sci. Numer. Simul. 102, Article ID 105903, 23 p. (2021; Zbl 1476.35208) Full Text: DOI arXiv OpenURL
Langarshoev, M. R. On the value of the widths of some classes of functions from \(L_2\). (Russian. English summary) Zbl 1472.42003 Dal’nevost. Mat. Zh. 21, No. 1, 61-70 (2021). Reviewer: Kateryna Pozharska (Kyjiw) MSC: 42A10 41A17 41A44 41A50 PDF BibTeX XML Cite \textit{M. R. Langarshoev}, Dal'nevost. Mat. Zh. 21, No. 1, 61--70 (2021; Zbl 1472.42003) Full Text: DOI MNR OpenURL
Trigub, Roald M. Relation between Fourier series and Wiener algebras. (English. Ukrainian original) Zbl 1469.42008 J. Math. Sci., New York 256, No. 6, 785-802 (2021); translation from Ukr. Mat. Visn. 18, No. 1, 80-103 (2021). MSC: 42A20 42A24 42B08 42B05 41A50 PDF BibTeX XML Cite \textit{R. M. Trigub}, J. Math. Sci., New York 256, No. 6, 785--802 (2021; Zbl 1469.42008); translation from Ukr. Mat. Visn. 18, No. 1, 80--103 (2021) Full Text: DOI OpenURL
Heydari, Mohammad Hossein; Razzaghi, Mohsen; Avazzadeh, Zakieh Numerical investigation of variable-order fractional Benjamin-Bona-Mahony-Burgers equation using a pseudo-spectral method. (English) Zbl 07377114 Math. Methods Appl. Sci. 44, No. 11, 8669-8683 (2021). MSC: 65M70 65M06 65M15 65D07 33C45 41A50 26A33 35R11 35Q53 PDF BibTeX XML Cite \textit{M. H. Heydari} et al., Math. Methods Appl. Sci. 44, No. 11, 8669--8683 (2021; Zbl 07377114) Full Text: DOI OpenURL
Hamid, Muhammad; Usman, Muhammad; Wang, Wei; Tian, Zhenfu Hybrid fully spectral linearized scheme for time-fractional evolutionary equations. (English) Zbl 07376891 Math. Methods Appl. Sci. 44, No. 5, 3890-3912 (2021). MSC: 65M70 65M12 65M15 41A50 26A33 35R11 35Q53 PDF BibTeX XML Cite \textit{M. Hamid} et al., Math. Methods Appl. Sci. 44, No. 5, 3890--3912 (2021; Zbl 07376891) Full Text: DOI OpenURL
Hosseininia, M.; Heydari, M. H.; Hooshmandasl, M. R.; Ghaini, F. M. Maalek; Avazzadeh, Z. A numerical method based on the Chebyshev cardinal functions for variable-order fractional version of the fourth-order 2D Kuramoto-Sivashinsky equation. (English) Zbl 07376640 Math. Methods Appl. Sci. 44, No. 2, 1831-1842 (2021). MSC: 65M70 65M06 65N35 41A50 26A33 35R11 35Q53 PDF BibTeX XML Cite \textit{M. Hosseininia} et al., Math. Methods Appl. Sci. 44, No. 2, 1831--1842 (2021; Zbl 07376640) Full Text: DOI OpenURL
Rao, T. S. S. R. K. Best approximation in spaces of compact operators. (English) Zbl 1473.41008 Linear Algebra Appl. 627, 72-79 (2021). Reviewer: Ravindra Kishor Bisht (Pune) MSC: 41A50 46B25 46B28 47L05 PDF BibTeX XML Cite \textit{T. S. S. R. K. Rao}, Linear Algebra Appl. 627, 72--79 (2021; Zbl 1473.41008) Full Text: DOI OpenURL
Rasol’ko, G. A.; Volkov, V. M. Method of orthogonal polynomials for an approximate solution of singular integro-differential equations as applied to two-dimensional diffraction problems. (English. Russian original) Zbl 07373283 Differ. Equ. 57, No. 6, 814-823 (2021); translation from Differ. Uravn. 57, No. 6, 830-839 (2021). MSC: 65R20 78A45 45E05 35R09 41A50 PDF BibTeX XML Cite \textit{G. A. Rasol'ko} and \textit{V. M. Volkov}, Differ. Equ. 57, No. 6, 814--823 (2021; Zbl 07373283); translation from Differ. Uravn. 57, No. 6, 830--839 (2021) Full Text: DOI OpenURL
Alimov, Alexey R.; Bednov, Borislav B. Monotone path-connectedness of Chebyshev sets in three-dimensional spaces. (English. Russian original) Zbl 1472.41019 Sb. Math. 212, No. 5, 636-654 (2021); translation from Mat. Sb. 212, No. 5, 37-57 (2021). Reviewer: Daniel Cárdenas Morales (Jaén) MSC: 41A65 41A50 46A55 PDF BibTeX XML Cite \textit{A. R. Alimov} and \textit{B. B. Bednov}, Sb. Math. 212, No. 5, 636--654 (2021; Zbl 1472.41019); translation from Mat. Sb. 212, No. 5, 37--57 (2021) Full Text: DOI OpenURL
Tsar’kov, I. G. Properties of monotone connected sets. (English. Russian original) Zbl 1479.46018 Math. Notes 109, No. 5, 819-827 (2021); translation from Mat. Zametki 109, No. 5, 781-792 (2021). MSC: 46B20 41A50 41A65 PDF BibTeX XML Cite \textit{I. G. Tsar'kov}, Math. Notes 109, No. 5, 819--827 (2021; Zbl 1479.46018); translation from Mat. Zametki 109, No. 5, 781--792 (2021) Full Text: DOI OpenURL
Asgarova, A. Kh.; Ismailov, V. É. A Chebyshev-type theorem characterizing best approximation of a continuous function by elements of the sum of two algebras. (English. Russian original) Zbl 1468.41011 Math. Notes 109, No. 1, 15-20 (2021); translation from Mat. Zametki 109, No. 1, 19-26 (2021). Reviewer: T.S.S.R.K. Rao (Bangalore) MSC: 41A50 41A30 41A65 46E25 PDF BibTeX XML Cite \textit{A. Kh. Asgarova} and \textit{V. É. Ismailov}, Math. Notes 109, No. 1, 15--20 (2021; Zbl 1468.41011); translation from Mat. Zametki 109, No. 1, 19--26 (2021) Full Text: DOI OpenURL
Markina, A.; Tumakov, D.; Giniyatova, D. Application of the collocation method for solving the problem of diffraction of an electromagnetic wave by a rectangular metal plate. (English) Zbl 1469.78007 Lobachevskii J. Math. 42, No. 6, 1355-1369 (2021). MSC: 78A45 78M22 41A50 65R20 PDF BibTeX XML Cite \textit{A. Markina} et al., Lobachevskii J. Math. 42, No. 6, 1355--1369 (2021; Zbl 1469.78007) Full Text: DOI OpenURL
Klyuev, D. S.; Neshcheret, A. M.; Osipov, O. V.; Sokolova, Y. V.; Tabakov, D. P. Solution of a two-dimensional electrodynamic problem of determining of the current density distribution function over a strip radiating structure based on chiral metamaterials. (English) Zbl 1469.78022 Lobachevskii J. Math. 42, No. 6, 1345-1354 (2021). MSC: 78A50 45F15 65R20 65D30 41A50 PDF BibTeX XML Cite \textit{D. S. Klyuev} et al., Lobachevskii J. Math. 42, No. 6, 1345--1354 (2021; Zbl 1469.78022) Full Text: DOI OpenURL
Gabeleh, M.; Moshokoa, S. P. Study of minimal invariant pairs for relatively nonexpansive mappings with respect to orbits. (English) Zbl 1475.90127 Optimization 70, No. 5-6, 1029-1045 (2021). MSC: 90C48 41A50 PDF BibTeX XML Cite \textit{M. Gabeleh} and \textit{S. P. Moshokoa}, Optimization 70, No. 5--6, 1029--1045 (2021; Zbl 1475.90127) Full Text: DOI OpenURL
Yu, Xuhong; Jin, Lusha; Wang, Zhongqing Efficient and accurate Chebyshev dual-Petrov-Galerkin methods for odd-order differential equations. (English) Zbl 1474.65460 J. Comput. Math. 39, No. 1, 43-62 (2021). MSC: 65N35 65N30 41A50 PDF BibTeX XML Cite \textit{X. Yu} et al., J. Comput. Math. 39, No. 1, 43--62 (2021; Zbl 1474.65460) Full Text: DOI OpenURL
Combettes, Patrick L.; Woodstock, Zev C. Reconstruction of functions from prescribed proximal points. (English) Zbl 1472.41014 J. Approx. Theory 268, Article ID 105606, 26 p. (2021). Reviewer: Francisco Pérez Acosta (La Laguna) MSC: 41A50 41A29 41A65 PDF BibTeX XML Cite \textit{P. L. Combettes} and \textit{Z. C. Woodstock}, J. Approx. Theory 268, Article ID 105606, 26 p. (2021; Zbl 1472.41014) Full Text: DOI arXiv OpenURL
Sukhorukova, Nadezda; Ugon, Julien; Yost, David Chebyshev multivariate polynomial approximation and point reduction procedure. (English) Zbl 1470.90097 Constr. Approx. 53, No. 3, 529-544 (2021). MSC: 90C26 41A15 41A50 PDF BibTeX XML Cite \textit{N. Sukhorukova} et al., Constr. Approx. 53, No. 3, 529--544 (2021; Zbl 1470.90097) Full Text: DOI arXiv OpenURL
Atta, A. G.; Abd-Elhameed, W. M.; Moatimid, G. M.; Youssri, Y. H. Shifted fifth-kind Chebyshev Galerkin treatment for linear hyperbolic first-order partial differential equations. (English) Zbl 1476.65235 Appl. Numer. Math. 167, 237-256 (2021). MSC: 65M60 65M70 65M12 65M15 65F05 41A50 PDF BibTeX XML Cite \textit{A. G. Atta} et al., Appl. Numer. Math. 167, 237--256 (2021; Zbl 1476.65235) Full Text: DOI OpenURL
Alimov, A. R. Solarity of Chebyshev sets in dual spaces and uniquely remotal sets. (English) Zbl 1470.41027 Lobachevskii J. Math. 42, No. 4, 785-790 (2021). Reviewer: Richard A. Zalik (Auburn) MSC: 41A50 PDF BibTeX XML Cite \textit{A. R. Alimov}, Lobachevskii J. Math. 42, No. 4, 785--790 (2021; Zbl 1470.41027) Full Text: DOI OpenURL
Gawlik, Evan S.; Nakatsukasa, Yuji Approximating the \(p\)th root by composite rational functions. (English) Zbl 1471.41006 J. Approx. Theory 266, Article ID 105577, 16 p. (2021). Reviewer: Josef Kofroň (Praha) MSC: 41A20 41A25 41A50 65D15 PDF BibTeX XML Cite \textit{E. S. Gawlik} and \textit{Y. Nakatsukasa}, J. Approx. Theory 266, Article ID 105577, 16 p. (2021; Zbl 1471.41006) Full Text: DOI arXiv OpenURL
George, Reny; Mitrović, Zoran D.; Aydi, Hassen On best approximations in hyperconvex spaces. (English) Zbl 1466.41015 J. Funct. Spaces 2021, Article ID 5555403, 5 p. (2021). MSC: 41A50 PDF BibTeX XML Cite \textit{R. George} et al., J. Funct. Spaces 2021, Article ID 5555403, 5 p. (2021; Zbl 1466.41015) Full Text: DOI OpenURL
Bogatyrëv, Andrei Projective view at optimization problem for multiband filter. (English) Zbl 1477.41007 Proc. Am. Math. Soc. 149, No. 7, 3021-3035 (2021). MSC: 41A20 41A50 49K35 94C60 PDF BibTeX XML Cite \textit{A. Bogatyrëv}, Proc. Am. Math. Soc. 149, No. 7, 3021--3035 (2021; Zbl 1477.41007) Full Text: DOI arXiv OpenURL
Xiang, Shuhuang Convergence rates on spectral orthogonal projection approximation for functions of algebraic and logarithmatic regularities. (English) Zbl 1465.41003 SIAM J. Numer. Anal. 59, No. 3, 1374-1398 (2021). MSC: 41A10 41A25 41A50 PDF BibTeX XML Cite \textit{S. Xiang}, SIAM J. Numer. Anal. 59, No. 3, 1374--1398 (2021; Zbl 1465.41003) Full Text: DOI arXiv OpenURL
Runovskii, Konstantin V. Multiplicator type operators and approximation of periodic functions of one variable by trigonometric polynomials. (English. Russian original) Zbl 1464.42001 Sb. Math. 212, No. 2, 234-264 (2021); translation from Mat. Sb. 212, No. 2, (2021). MSC: 42A10 41A17 41A50 42B15 PDF BibTeX XML Cite \textit{K. V. Runovskii}, Sb. Math. 212, No. 2, 234--264 (2021; Zbl 1464.42001); translation from Mat. Sb. 212, No. 2, (2021) Full Text: DOI OpenURL
Langarshoev, Mukhtor Ramazonovich; Khorazmshoev, Saiddzhobir Saidnasilloevich Sharp inequalities of Jackson-Stechkin type and widths of classes of functions in \(L_2\). (Russian. English translation) Zbl 1474.42012 Ufim. Mat. Zh. 13, No. 1, 56-68 (2021); translation in Ufa Math. J. 13, No. 1, 56-67 (2021). MSC: 42A10 41A17 41A44 41A50 PDF BibTeX XML Cite \textit{M. R. Langarshoev} and \textit{S. S. Khorazmshoev}, Ufim. Mat. Zh. 13, No. 1, 56--68 (2021; Zbl 1474.42012); translation in Ufa Math. J. 13, No. 1, 56--67 (2021) Full Text: DOI MNR OpenURL
Gürdal, M.; Savaş, E. A note on uniquely remotal sets in 2-Banach spaces. (English) Zbl 1474.46031 Electron. J. Math. Anal. Appl. 9, No. 2, 151-157 (2021). MSC: 46B20 41A50 41A65 PDF BibTeX XML Cite \textit{M. Gürdal} and \textit{E. Savaş}, Electron. J. Math. Anal. Appl. 9, No. 2, 151--157 (2021; Zbl 1474.46031) Full Text: Link OpenURL
Mohebi, H.; Salkhordeh, S. Robust constrained best approximation with nonconvex constraints. (English) Zbl 1462.41008 J. Glob. Optim. 79, No. 4, 885-904 (2021). MSC: 41A29 41A50 90C22 90C25 PDF BibTeX XML Cite \textit{H. Mohebi} and \textit{S. Salkhordeh}, J. Glob. Optim. 79, No. 4, 885--904 (2021; Zbl 1462.41008) Full Text: DOI OpenURL
Bauschke, Heinz H.; Ouyang, Hui; Wang, Xianfu On the linear convergence of circumcentered isometry methods. (English) Zbl 07340125 Numer. Algorithms 87, No. 1, 263-297 (2021). MSC: 47-XX 41A50 47H30 65B99 46B04 90C25 PDF BibTeX XML Cite \textit{H. H. Bauschke} et al., Numer. Algorithms 87, No. 1, 263--297 (2021; Zbl 07340125) Full Text: DOI arXiv OpenURL
Jha, Sangita; Chand, A. K. B.; Navascués, M. A. Approximation by shape preserving fractal functions with variable scalings. (English) Zbl 1469.41004 Calcolo 58, No. 1, Paper No. 8, 24 p. (2021). Reviewer: Francisco Pérez Acosta (La Laguna) MSC: 41A29 28A80 41A15 41A30 41A50 42A15 PDF BibTeX XML Cite \textit{S. Jha} et al., Calcolo 58, No. 1, Paper No. 8, 24 p. (2021; Zbl 1469.41004) Full Text: DOI OpenURL
Floater, Michael S.; Manni, Carla; Sande, Espen; Speleers, Hendrik Best low-rank approximations and Kolmogorov \(n\)-widths. (English) Zbl 07331676 SIAM J. Matrix Anal. Appl. 42, No. 1, 330-350 (2021). MSC: 65F55 41A50 41A52 PDF BibTeX XML Cite \textit{M. S. Floater} et al., SIAM J. Matrix Anal. Appl. 42, No. 1, 330--350 (2021; Zbl 07331676) Full Text: DOI arXiv OpenURL
Potseiko, P. G.; Rovba, E. A. Approximations on classes of Poisson integrals by Fourier-Chebyshev rational integral operators. (English. Russian original) Zbl 1460.42003 Sib. Math. J. 62, No. 2, 292-312 (2021); translation from Sib. Mat. Zh. 62, No. 2, 362-386 (2021). MSC: 42A10 41A35 41A60 41A50 PDF BibTeX XML Cite \textit{P. G. Potseiko} and \textit{E. A. Rovba}, Sib. Math. J. 62, No. 2, 292--312 (2021; Zbl 1460.42003); translation from Sib. Mat. Zh. 62, No. 2, 362--386 (2021) Full Text: DOI OpenURL
Lin, Shao-bo; Wang, Yu Guang; Zhou, Ding-Xuan Distributed filtered hyperinterpolation for noisy data on the sphere. (English) Zbl 07326331 SIAM J. Numer. Anal. 59, No. 2, 634-659 (2021). MSC: 65D05 41A50 33C55 65T60 68T09 PDF BibTeX XML Cite \textit{S.-b. Lin} et al., SIAM J. Numer. Anal. 59, No. 2, 634--659 (2021; Zbl 07326331) Full Text: DOI arXiv OpenURL
Schiefermayr, Klaus; Zinchenko, Maxim Norm estimates for Chebyshev polynomials, I. (English) Zbl 1462.41012 J. Approx. Theory 265, Article ID 105561, 14 p. (2021). Reviewer: D. K. Ugulava (Tbilisi) MSC: 41A50 30C10 30E10 PDF BibTeX XML Cite \textit{K. Schiefermayr} and \textit{M. Zinchenko}, J. Approx. Theory 265, Article ID 105561, 14 p. (2021; Zbl 1462.41012) Full Text: DOI OpenURL
Yamani, Hashim A. Supersymmetric Fibonacci polynomials. (English) Zbl 1459.81048 Anal. Math. Phys. 11, No. 2, Paper No. 65, 13 p. (2021). MSC: 81Q60 81Q10 47B36 42C05 41A50 11B39 PDF BibTeX XML Cite \textit{H. A. Yamani}, Anal. Math. Phys. 11, No. 2, Paper No. 65, 13 p. (2021; Zbl 1459.81048) Full Text: DOI OpenURL
Caseiro, Raquel; Facas Vicente, M. A.; Vitória, José Projection of a point onto the intersection of spheres in linear varieties. (English) Zbl 1469.51020 Linear Algebra Appl. 610, 40-51 (2021). Reviewer: Georgi Hristov Georgiev (Shumen) MSC: 51N20 41A50 41A52 51M05 PDF BibTeX XML Cite \textit{R. Caseiro} et al., Linear Algebra Appl. 610, 40--51 (2021; Zbl 1469.51020) Full Text: DOI OpenURL
Srivastava, Nikhil; Singh, Aman; Kumar, Yashveer; Singh, Vineet Kumar Efficient numerical algorithms for Riesz-space fractional partial differential equations based on finite difference/operational matrix. (English) Zbl 1475.65081 Appl. Numer. Math. 161, 244-274 (2021). Reviewer: Michael Plum (Karlsruhe) MSC: 65M06 65N06 65M12 65M15 42C10 41A50 35R11 PDF BibTeX XML Cite \textit{N. Srivastava} et al., Appl. Numer. Math. 161, 244--274 (2021; Zbl 1475.65081) Full Text: DOI OpenURL
Serdyuk, Anatolii S.; Sokolenko, Igor V. Asymptotic estimates for the best uniform approximations of classes of convolution of periodic functions of high smoothness. (English. Ukrainian original) Zbl 1462.41013 J. Math. Sci., New York 252, No. 4, 526-540 (2021); translation from Ukr. Mat. Visn. 17, No. 3, 396-413 (2020). Reviewer: Richard A. Zalik (Auburn) MSC: 41A50 42A10 PDF BibTeX XML Cite \textit{A. S. Serdyuk} and \textit{I. V. Sokolenko}, J. Math. Sci., New York 252, No. 4, 526--540 (2021; Zbl 1462.41013); translation from Ukr. Mat. Visn. 17, No. 3, 396--413 (2020) Full Text: DOI arXiv OpenURL
Shakirov, I. A. Approximation of the Lebesgue constant of a Lagrange polynomial by a logarithmic function with shifted argument. (English. Russian original) Zbl 1459.42005 J. Math. Sci., New York 252, No. 3, 445-452 (2021); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 153, 151-157 (2018). Reviewer: Włodzimierz Łenski (Poznań) MSC: 42A15 41A50 41A10 PDF BibTeX XML Cite \textit{I. A. Shakirov}, J. Math. Sci., New York 252, No. 3, 445--452 (2021; Zbl 1459.42005); translation from Itogi Nauki Tekh., Ser. Sovrem. Mat. Prilozh., Temat. Obz. 153, 151--157 (2018) Full Text: DOI OpenURL
Do, Quan H.; Ngo, Hoa T. B.; Razzaghi, Mohsen A generalized fractional-order Chebyshev wavelet method for two-dimensional distributed-order fractional differential equations. (English) Zbl 1456.65130 Commun. Nonlinear Sci. Numer. Simul. 95, Article ID 105597, 16 p. (2021). MSC: 65M70 34A08 35R11 41A50 65T60 PDF BibTeX XML Cite \textit{Q. H. Do} et al., Commun. Nonlinear Sci. Numer. Simul. 95, Article ID 105597, 16 p. (2021; Zbl 1456.65130) Full Text: DOI OpenURL
Akishev, G. Estimates of the best approximations of the functions of the Nikol’skii-Besov class in the generalized space of Lorentz. (English) Zbl 1454.42001 Adv. Oper. Theory 6, No. 1, Paper No. 15, 35 p. (2021). MSC: 42A10 41A10 41A25 42A05 41A50 PDF BibTeX XML Cite \textit{G. Akishev}, Adv. Oper. Theory 6, No. 1, Paper No. 15, 35 p. (2021; Zbl 1454.42001) Full Text: DOI OpenURL
Witherden, Freddie D.; Vincent, P. E. On nodal point sets for flux reconstruction. (English) Zbl 07241283 J. Comput. Appl. Math. 381, Article ID 113014, 13 p. (2021). MSC: 65M60 65M70 65L06 65M15 65D05 65D32 65K10 41A50 35Q31 PDF BibTeX XML Cite \textit{F. D. Witherden} and \textit{P. E. Vincent}, J. Comput. Appl. Math. 381, Article ID 113014, 13 p. (2021; Zbl 07241283) Full Text: DOI Link OpenURL
Dadashi, M. R.; Haghighi, A. R.; Soltanian, F.; Yari, A. On the numerical solution of optimal control problems via Bell polynomials basis. (English) Zbl 07497021 Iran. J. Numer. Anal. Optim. 10, No. 2, 197-221 (2020). MSC: 49J15 65M70 41A50 PDF BibTeX XML Cite \textit{M. R. Dadashi} et al., Iran. J. Numer. Anal. Optim. 10, No. 2, 197--221 (2020; Zbl 07497021) Full Text: DOI OpenURL
Abu-Sirhan, Eyad Pointwise best coapproximation in the space of Bochner integrable functions. (English) Zbl 07473689 J. Numer. Anal. Approx. Theory 49, No. 2, 95-99 (2020). MSC: 41A50 41A52 41A65 PDF BibTeX XML Cite \textit{E. Abu-Sirhan}, J. Numer. Anal. Approx. Theory 49, No. 2, 95--99 (2020; Zbl 07473689) OpenURL
Konar, Pulak; Bhandari, Samir Kumar; Chandok, Sumit; Mukheimer, Aiman Multivalued weak cyclic \(\delta \)-contraction mappings. (English) Zbl 07461024 J. Inequal. Appl. 2020, Paper No. 250, 11 p. (2020). MSC: 41A50 47H10 54H25 PDF BibTeX XML Cite \textit{P. Konar} et al., J. Inequal. Appl. 2020, Paper No. 250, 11 p. (2020; Zbl 07461024) Full Text: DOI OpenURL
Rao, G. V. V. J.; Nashine, H. K.; Kadelburg, Z. Best proximity point results via simulation functions in metric-like spaces. (English) Zbl 07415811 Kragujevac J. Math. 44, No. 3, 401-413 (2020). MSC: 47H10 41A50 54H25 PDF BibTeX XML Cite \textit{G. V. V. J. Rao} et al., Kragujevac J. Math. 44, No. 3, 401--413 (2020; Zbl 07415811) Full Text: Link OpenURL
Mesgarani, H.; Rashidnina, J.; Aghdam, Y. Esmaeelzade; Nikan, O. The impact of Chebyshev collocation method on solutions of fractional advection-diffusion equation. (English) Zbl 1472.65101 Int. J. Appl. Comput. Math. 6, No. 5, Paper No. 149, 12 p. (2020). MSC: 65M06 65N35 65M12 65M15 41A50 35R11 PDF BibTeX XML Cite \textit{H. Mesgarani} et al., Int. J. Appl. Comput. Math. 6, No. 5, Paper No. 149, 12 p. (2020; Zbl 1472.65101) Full Text: DOI OpenURL
Chiţescu, Ion; Preda, Vasile; Sfetcu, Răzvan-Cornel Polya-type best approximation of convex sets. (English) Zbl 1465.41010 J. Nonlinear Convex Anal. 21, No. 3, 575-586 (2020). Reviewer: T.S.S.R.K. Rao (Bangalore) MSC: 41A50 46A45 46B42 46B45 PDF BibTeX XML Cite \textit{I. Chiţescu} et al., J. Nonlinear Convex Anal. 21, No. 3, 575--586 (2020; Zbl 1465.41010) Full Text: Link OpenURL
Bauschke, Heinz H.; Ouyang, Hui; Wang, Xianfu Circumcentered methods induced by isometries. (English) Zbl 07341166 Vietnam J. Math. 48, No. 3, 471-508 (2020). MSC: 47H09 65K10 41A50 65K05 90C25 PDF BibTeX XML Cite \textit{H. H. Bauschke} et al., Vietnam J. Math. 48, No. 3, 471--508 (2020; Zbl 07341166) Full Text: DOI arXiv OpenURL
Rivlin, Theodore J. Chebyshev polynomials. From approximation theory to algebra and number theory. Corrected reprint of the 1990 2nd edition. (English) Zbl 1458.41001 Mineola, NY: Dover Publications (ISBN 978-0-486-84233-2/pbk). xiii, 254 p. (2020). MSC: 41-01 41A50 41A05 PDF BibTeX XML Cite \textit{T. J. Rivlin}, Chebyshev polynomials. From approximation theory to algebra and number theory. Corrected reprint of the 1990 2nd edition. Mineola, NY: Dover Publications (2020; Zbl 1458.41001) OpenURL
Milev, Lozko; Naidenov, Nikola Further results on the zeros of the derivative of oscillating polynomials with Laguerre weight. (English) Zbl 1460.26016 Draganov, Borislav (ed.) et al., Constructive theory of functions. Proceedings of the 13th international conference, Sozopol, Bulgaria, June 2–8, 2019. Dedicated to the memory of Blagovest Sendov. Sofia: Prof. Marin Drinov Academic Publishing House. 147-155 (2020). MSC: 26C10 41A50 65H04 PDF BibTeX XML Cite \textit{L. Milev} and \textit{N. Naidenov}, in: Constructive theory of functions. Proceedings of the 13th international conference, Sozopol, Bulgaria, June 2--8, 2019. Dedicated to the memory of Blagovest Sendov. Sofia: Prof. Marin Drinov Academic Publishing House. 147--155 (2020; Zbl 1460.26016) Full Text: Link OpenURL
Fedunyk-Yaremchuk, O. V.; Hembars’kyi, M. V.; Hembars’ka, S. B. Approximative characteristics of the Nikol’skii-Besov-type classes of periodic functions in the space \(B_{\infty,1}\). (English) Zbl 1458.41009 Carpathian Math. Publ. 12, No. 2, 376-391 (2020). Reviewer: Yuri A. Farkov (Moskva) MSC: 41A46 41A50 PDF BibTeX XML Cite \textit{O. V. Fedunyk-Yaremchuk} et al., Carpathian Math. Publ. 12, No. 2, 376--391 (2020; Zbl 1458.41009) Full Text: DOI OpenURL
Stoyanov, Borislav Self-shrinking chaos based pseudo-random algorithm. (English) Zbl 07307051 Ann. Acad. Rom. Sci., Math. Appl. 12, No. 1-2, 246-255 (2020). MSC: 94A60 41A50 11K45 11B83 68W20 PDF BibTeX XML Cite \textit{B. Stoyanov}, Ann. Acad. Rom. Sci., Math. Appl. 12, No. 1--2, 246--255 (2020; Zbl 07307051) Full Text: Link OpenURL
Yang, Yuning The epsilon-alternating least squares for orthogonal low-rank tensor approximation and its global convergence. (English) Zbl 1458.90528 SIAM J. Matrix Anal. Appl. 41, No. 4, 1797-1825 (2020). MSC: 90C26 15A18 15A69 41A50 PDF BibTeX XML Cite \textit{Y. Yang}, SIAM J. Matrix Anal. Appl. 41, No. 4, 1797--1825 (2020; Zbl 1458.90528) Full Text: DOI arXiv OpenURL
Qin, Yonghui; Chen, Yanping; Huang, Yunqing; Ma, Heping Multidomain Legendre-Galerkin least-squares method for linear differential equations with variable coefficients. (English) Zbl 1463.65326 Numer. Math., Theory Methods Appl. 13, No. 3, 665-688 (2020). MSC: 65M70 65N35 65M15 42C10 41A50 PDF BibTeX XML Cite \textit{Y. Qin} et al., Numer. Math., Theory Methods Appl. 13, No. 3, 665--688 (2020; Zbl 1463.65326) Full Text: DOI OpenURL
Zhang, Zihou; Zhou, Yu; Liu, Chunyan; Liu, Ruijuan Research progress of the best approximation problems based on Banach space geometry. (Chinese. English summary) Zbl 1463.41068 Adv. Math., Beijing 49, No. 5, 513-527 (2020). MSC: 41A50 41A65 PDF BibTeX XML Cite \textit{Z. Zhang} et al., Adv. Math., Beijing 49, No. 5, 513--527 (2020; Zbl 1463.41068) Full Text: DOI OpenURL
Shakirov, I. A. Extreme problems related to the approximation of the Lebesgue constant of a Fourier operator by a logarithmic function. (English) Zbl 1469.41010 Lobachevskii J. Math. 41, No. 11, 2287-2294 (2020). MSC: 41A50 PDF BibTeX XML Cite \textit{I. A. Shakirov}, Lobachevskii J. Math. 41, No. 11, 2287--2294 (2020; Zbl 1469.41010) Full Text: DOI OpenURL
Arestov, V. Uniform approximation of differentiation operators by bounded linear operators in the space \(L_r\). (English) Zbl 1474.41035 Anal. Math. 46, No. 3, 425-445 (2020). Reviewer: Maria Alessandra Ragusa (Catania) MSC: 41A35 26D10 41A50 PDF BibTeX XML Cite \textit{V. Arestov}, Anal. Math. 46, No. 3, 425--445 (2020; Zbl 1474.41035) Full Text: DOI OpenURL
Tikhonov, S.; Yuditskii, P. Sharp Remez inequality. (English) Zbl 1456.41002 Constr. Approx. 52, No. 2, 233-246 (2020). Reviewer: Klaus Schiefermayr (Wels) MSC: 41A17 30C35 41A44 41A50 PDF BibTeX XML Cite \textit{S. Tikhonov} and \textit{P. Yuditskii}, Constr. Approx. 52, No. 2, 233--246 (2020; Zbl 1456.41002) Full Text: DOI arXiv OpenURL
Malachivskyy, P. S.; Pizyur, Ya. V.; Malachivsky, R. P. Chebyshev approximation by a rational expression for functions of many variables. (English. Russian original) Zbl 1458.65017 Cybern. Syst. Anal. 56, No. 5, 811-819 (2020); translation from Kibern. Sist. Anal. 2020, No. 5, 146-156 (2020). MSC: 65D15 41A50 PDF BibTeX XML Cite \textit{P. S. Malachivskyy} et al., Cybern. Syst. Anal. 56, No. 5, 811--819 (2020; Zbl 1458.65017); translation from Kibern. Sist. Anal. 2020, No. 5, 146--156 (2020) Full Text: DOI OpenURL
Malachivskyy, P. S.; Pizyur, Ya. V.; Malachivskyi, R. P.; Ukhanska, O. M. Chebyshev approximation of functions of several variables. (English. Russian original) Zbl 1455.65030 Cybern. Syst. Anal. 56, No. 1, 118-125 (2020); translation from Kibern. Sist. Anal. 2020, No. 1, 138-146 (2020). MSC: 65D15 41A50 PDF BibTeX XML Cite \textit{P. S. Malachivskyy} et al., Cybern. Syst. Anal. 56, No. 1, 118--125 (2020; Zbl 1455.65030); translation from Kibern. Sist. Anal. 2020, No. 1, 138--146 (2020) Full Text: DOI OpenURL