Pornpeerakeat, Sacharuck; Katawaethwarag, Sakda Chebyshev-Lagrange multipliers technique for vibration analysis of functionally graded material beams using various beam theories. (English) Zbl 07528519 Adv. Appl. Math. Mech. 14, No. 4, 871-892 (2022). MSC: 41A50 65D15 65D20 74H45 PDF BibTeX XML Cite \textit{S. Pornpeerakeat} and \textit{S. Katawaethwarag}, Adv. Appl. Math. Mech. 14, No. 4, 871--892 (2022; Zbl 07528519) Full Text: DOI OpenURL
Nguyen, Van Dung; Nguyen, Van Kien; Sickel, Winfried \(s\)-numbers of embeddings of weighted Wiener algebras. (English) Zbl 07528011 J. Approx. Theory 279, Article ID 105745, 26 p. (2022). MSC: 41A25 41A44 41A60 42A10 47B06 41-XX 42-XX PDF BibTeX XML Cite \textit{V. D. Nguyen} et al., J. Approx. Theory 279, Article ID 105745, 26 p. (2022; Zbl 07528011) Full Text: DOI OpenURL
Salamatbakhsh, M.; Haghi, R. H.; Fallahi, K. Best proximity of proximal \(\mathcal{F}^\ast\)-weak contraction. (English) Zbl 07527641 J. Linear Topol. Algebra 11, No. 1, 15-26 (2022). MSC: 47H10 54H25 05C20 PDF BibTeX XML Cite \textit{M. Salamatbakhsh} et al., J. Linear Topol. Algebra 11, No. 1, 15--26 (2022; Zbl 07527641) Full Text: DOI OpenURL
Goldenshluger, Alexander; Lepski, Oleg V. Minimax estimation of norms of a probability density. I: Lower bounds. (English) Zbl 07526578 Bernoulli 28, No. 2, 1120-1154 (2022). MSC: 62Gxx 62Mxx 94Axx PDF BibTeX XML Cite \textit{A. Goldenshluger} and \textit{O. V. Lepski}, Bernoulli 28, No. 2, 1120--1154 (2022; Zbl 07526578) Full Text: DOI Link OpenURL
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
Ern, Alexandre; Gudi, Thirupathi; Smears, Iain; Vohralík, Martin Equivalence of local- and global-best approximations, a simple stable local commuting projector, and optimal \(hp\) approximation estimates in \(\boldsymbol{H}(\operatorname{div})\). (English) Zbl 07524708 IMA J. Numer. Anal. 42, No. 2, 1023-1049 (2022). MSC: 65-XX PDF BibTeX XML Cite \textit{A. Ern} et al., IMA J. Numer. Anal. 42, No. 2, 1023--1049 (2022; Zbl 07524708) Full Text: DOI OpenURL
Gesztesy, Fritz; Michael, Isaac; Pang, Michael M. H. Optimality of constants in power-weighted Birman-Hardy-Rellich-type inequalities with logarithmic refinements. (English. French summary) Zbl 07523616 Cubo 24, No. 1, 115-165 (2022). MSC: 26D10 35A23 41A44 PDF BibTeX XML Cite \textit{F. Gesztesy} et al., Cubo 24, No. 1, 115--165 (2022; Zbl 07523616) Full Text: Link 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
Saito, Naoki; Shao, Yiqun eGHWT: the extended generalized Haar-Walsh transform. (English) Zbl 07510343 J. Math. Imaging Vis. 64, No. 3, 261-283 (2022). MSC: 68-XX 94-XX PDF BibTeX XML Cite \textit{N. Saito} and \textit{Y. Shao}, J. Math. Imaging Vis. 64, No. 3, 261--283 (2022; Zbl 07510343) Full Text: DOI OpenURL
Stevenson, Rob; van Venetië, Raymond; Westerdiep, Jan A wavelet-in-time, finite element-in-space adaptive method for parabolic evolution equations. (English) Zbl 07506442 Adv. Comput. Math. 48, No. 3, Paper No. 17, 43 p. (2022). MSC: 65-XX 35K20 65F08 65M12 65M60 65T60 PDF BibTeX XML Cite \textit{R. Stevenson} et al., Adv. Comput. Math. 48, No. 3, Paper No. 17, 43 p. (2022; Zbl 07506442) Full Text: DOI OpenURL
Kolomoitsev, Yu.; Skopina, M. Uniform approximation by multivariate quasi-projection operators. (English) Zbl 07506380 Anal. Math. Phys. 12, No. 2, Paper No. 68, 23 p. (2022). MSC: 41A25 41A17 41A15 42B10 94A20 97N50 PDF BibTeX XML Cite \textit{Yu. Kolomoitsev} and \textit{M. Skopina}, Anal. Math. Phys. 12, No. 2, Paper No. 68, 23 p. (2022; Zbl 07506380) 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
Temlyakov, Vladimir N.; Ullrich, Tino Approximation of functions with small mixed smoothness in the uniform norm. (English) Zbl 07501642 J. Approx. Theory 277, Article ID 105718, 23 p. (2022). MSC: 41A46 41A25 41A63 42A10 68Q25 94A20 PDF BibTeX XML Cite \textit{V. N. Temlyakov} and \textit{T. Ullrich}, J. Approx. Theory 277, Article ID 105718, 23 p. (2022; Zbl 07501642) 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
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
Beg, Ismat; Bartwal, Ayush; Rawat, Shivam; Dimri, R. C. Best proximity points in noncommutative Banach spaces. (English) Zbl 07490209 Comput. Appl. Math. 41, No. 1, Paper No. 41, 11 p. (2022). MSC: 47H10 41A65 46L52 PDF BibTeX XML Cite \textit{I. Beg} et al., Comput. Appl. Math. 41, No. 1, Paper No. 41, 11 p. (2022; Zbl 07490209) 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
Alpan, Gökalp Extremal polynomials on a Jordan arc. (English) Zbl 07480982 J. Approx. Theory 276, Article ID 105708, 8 p. (2022). MSC: 41-XX 42-XX 41A17 41A44 42C05 33C45 PDF BibTeX XML Cite \textit{G. Alpan}, J. Approx. Theory 276, Article ID 105708, 8 p. (2022; Zbl 07480982) Full Text: DOI arXiv 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
Alzer, Horst; Kwong, Man Kam Sharp inequalities for sine polynomials. (English) Zbl 07479518 Publ. Math. 100, No. 1-2, 185-203 (2022). MSC: 26D05 33B10 33C45 41A44 PDF BibTeX XML Cite \textit{H. Alzer} and \textit{M. K. Kwong}, Publ. Math. 100, No. 1--2, 185--203 (2022; Zbl 07479518) Full Text: DOI OpenURL
Houston, Paul; Roggendorf, Sarah; van der Zee, Kristoffer G. Gibbs phenomena for \(L^q\)-best approximation in finite element spaces. (English) Zbl 1483.65188 ESAIM, Math. Model. Numer. Anal. 56, No. 1, 177-211 (2022). MSC: 65N30 41A10 65N50 PDF BibTeX XML Cite \textit{P. Houston} et al., ESAIM, Math. Model. Numer. Anal. 56, No. 1, 177--211 (2022; Zbl 1483.65188) Full Text: DOI arXiv OpenURL
Carstensen, Carsten; Nataraj, Neela Lowest-order equivalent nonstandard finite element methods for biharmonic plates. (English) Zbl 1483.65177 ESAIM, Math. Model. Numer. Anal. 56, No. 1, 41-78 (2022). MSC: 65N30 65N12 65N15 65N50 31A30 74K20 PDF BibTeX XML Cite \textit{C. Carstensen} and \textit{N. Nataraj}, ESAIM, Math. Model. Numer. Anal. 56, No. 1, 41--78 (2022; Zbl 1483.65177) 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
Bauschke, Heinz H.; Singh, Shambhavi; Wang, Xianfu Finding best approximation pairs for two intersections of closed convex sets. (English) Zbl 07462060 Comput. Optim. Appl. 81, No. 1, 289-308 (2022). MSC: 90C25 65K05 47H09 PDF BibTeX XML Cite \textit{H. H. Bauschke} et al., Comput. Optim. Appl. 81, No. 1, 289--308 (2022; Zbl 07462060) Full Text: DOI arXiv OpenURL
Mal, Arpita; Paul, Kallol Distance formulae and best approximation in the space of compact operators. (English) Zbl 07461204 J. Math. Anal. Appl. 509, No. 1, Article ID 125952, 19 p. (2022). MSC: 46B28 46B20 41A65 47L05 PDF BibTeX XML Cite \textit{A. Mal} and \textit{K. Paul}, J. Math. Anal. Appl. 509, No. 1, Article ID 125952, 19 p. (2022; Zbl 07461204) Full Text: DOI 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
Qu, Wei; Qian, Tao; Li, Haichou; Zhu, Kehe Best kernel approximation in Bergman spaces. (English) Zbl 07442830 Appl. Math. Comput. 416, Article ID 126749, 13 p. (2022). MSC: 30H20 30C40 30J10 46E22 46E20 PDF BibTeX XML Cite \textit{W. Qu} et al., Appl. Math. Comput. 416, Article ID 126749, 13 p. (2022; Zbl 07442830) Full Text: DOI OpenURL
Totik, Vilmos The order of \(L^1\)-approximation by elements of the disc algebra. (English) Zbl 07438131 Anal. Math. Phys. 12, No. 1, Paper No. 4, 5 p. (2022). Reviewer: Raymond Mortini (Metz) MSC: 46E15 30H10 41A65 PDF BibTeX XML Cite \textit{V. Totik}, Anal. Math. Phys. 12, No. 1, Paper No. 4, 5 p. (2022; Zbl 07438131) Full Text: DOI OpenURL
Silva, Jorge F. Compressibility analysis of asymptotically mean stationary processes. (English) Zbl 1475.60068 Appl. Comput. Harmon. Anal. 56, 61-97 (2022). MSC: 60G10 94A12 PDF BibTeX XML Cite \textit{J. F. Silva}, Appl. Comput. Harmon. Anal. 56, 61--97 (2022; Zbl 1475.60068) Full Text: DOI arXiv OpenURL
Wójcik, Paweł Vertices of the unit ball of subspaces in \(\mathcal{L}(H)\) and strong unicity of best approximation in \(\mathcal{L}(l_2^2)\). (English) Zbl 07425717 Linear Algebra Appl. 632, 281-293 (2022). MSC: 46B20 41A35 41A52 41A65 47A58 PDF BibTeX XML Cite \textit{P. Wójcik}, Linear Algebra Appl. 632, 281--293 (2022; Zbl 07425717) Full Text: DOI OpenURL
Mazaheri, H.; Salehi, Mohammad Jafar The convexity of Chebyshev sets in normed spaces. (English) Zbl 07527974 J. Mahani Math. Res. Cent. 10, No. 1, 111-117 (2021). MSC: 41A65 41A52 46N10 PDF BibTeX XML Cite \textit{H. Mazaheri} and \textit{M. J. Salehi}, J. Mahani Math. Res. Cent. 10, No. 1, 111--117 (2021; Zbl 07527974) Full Text: DOI OpenURL
Censor, Yair; Nisenbaum, Ariel String-averaging methods for best approximation to common fixed point sets of operators: the finite and infinite cases. (English) Zbl 07525613 Fixed Point Theory Algorithms Sci. Eng. 2021, Paper No. 9, 21 p. (2021). MSC: 47-XX 54-XX PDF BibTeX XML Cite \textit{Y. Censor} and \textit{A. Nisenbaum}, Fixed Point Theory Algorithms Sci. Eng. 2021, Paper No. 9, 21 p. (2021; Zbl 07525613) Full Text: DOI OpenURL
Zhu, Ling Sharp refined quadratic estimations of Shafer’s inequalities. (English) Zbl 07516013 AIMS Math. 6, No. 5, 5020-5027 (2021). MSC: 26D05 26D15 42A10 PDF BibTeX XML Cite \textit{L. Zhu}, AIMS Math. 6, No. 5, 5020--5027 (2021; Zbl 07516013) Full Text: DOI OpenURL
Xu, Jiao; Chen, Yinlan On a class of inverse palindromic eigenvalue problem. (English) Zbl 07513674 AIMS Math. 6, No. 8, 7971-7983 (2021). MSC: 15A29 15A09 15A18 PDF BibTeX XML Cite \textit{J. Xu} and \textit{Y. Chen}, AIMS Math. 6, No. 8, 7971--7983 (2021; Zbl 07513674) Full Text: DOI OpenURL
Babenko, V. F.; Babenko, Yu. V.; Kovalenko, O. V. On asymptotically optimal cubatures for multidimensional Sobolev spaces. (English) Zbl 07512240 Res. Math. 29, No. 2, 15-27 (2021). MSC: 41A55 41A44 26D10 PDF BibTeX XML Cite \textit{V. F. Babenko} et al., Res. Math. 29, No. 2, 15--27 (2021; Zbl 07512240) Full Text: DOI OpenURL
Işık, Hüseyin; Parvaneh, Vahid; Haddadi, Mohammad Reza Strong and pure fixed point properties of mappings on normed spaces. (English) Zbl 07500426 Math. Sci., Springer 15, No. 3, 305-309 (2021). MSC: 46A32 46M05 41A17 PDF BibTeX XML Cite \textit{H. Işık} et al., Math. Sci., Springer 15, No. 3, 305--309 (2021; Zbl 07500426) 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
Zeghdane, Rebiha Numerical approach for solving nonlinear stochastic Itô-Volterra integral equations using shifted Legendre polynomials. (English) Zbl 1482.65014 Int. J. Dyn. Syst. Differ. Equ. 11, No. 1, 69-88 (2021). MSC: 65C30 65R20 45D05 45R05 33C45 PDF BibTeX XML Cite \textit{R. Zeghdane}, Int. J. Dyn. Syst. Differ. Equ. 11, No. 1, 69--88 (2021; Zbl 1482.65014) Full Text: DOI OpenURL
Jafarov, Sadulla Z. Converse theorem of the approximation theory of functions in Morrey-Smirnov classes related to the derivatives of functions. (English) Zbl 1483.41008 Proc. Inst. Math. Mech., Natl. Acad. Sci. Azerb. 47, No. 2, 205-214 (2021). MSC: 41A27 26D15 41A20 41A25 41A28 42A10 46E30 PDF BibTeX XML Cite \textit{S. Z. Jafarov}, Proc. Inst. Math. Mech., Natl. Acad. Sci. Azerb. 47, No. 2, 205--214 (2021; Zbl 1483.41008) Full Text: DOI OpenURL
Nigam, H. K.; Mursaleen, Mohammad; Rani, Supriya Approximation of function using generalized Zygmund class. (English) Zbl 07485429 Adv. Difference Equ. 2021, Paper No. 34, 22 p. (2021). MSC: 42A10 41A10 42B05 42B08 PDF BibTeX XML Cite \textit{H. K. Nigam} et al., Adv. Difference Equ. 2021, Paper No. 34, 22 p. (2021; Zbl 07485429) 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
Parfinovych, N. V. Non-symmetric approximations of functional classes by splines on the real line. (English) Zbl 1481.41015 Carpathian Math. Publ. 13, No. 3, 831-837 (2021). MSC: 41A46 41A17 41A65 46A45 PDF BibTeX XML Cite \textit{N. V. Parfinovych}, Carpathian Math. Publ. 13, No. 3, 831--837 (2021; Zbl 1481.41015) Full Text: DOI OpenURL
Cakir, Z.; Aykol, C.; Guliyev, V. S.; Serbetci, A. Approximation by trigonometric polynomials in the variable exponent weighted Morrey spaces. (English) Zbl 07482110 Carpathian Math. Publ. 13, No. 3, 750-763 (2021). MSC: 41A10 41A25 42A10 PDF BibTeX XML Cite \textit{Z. Cakir} et al., Carpathian Math. Publ. 13, No. 3, 750--763 (2021; Zbl 07482110) Full Text: DOI OpenURL
Jafarov, Sadulla Z. Some inequalities for best trigonometric approximation and Fourier coefficients in weighted Orlicz spaces. (English) Zbl 07481086 Mat. Zh. 21, No. 2, 47-56 (2021). MSC: 42A10 41A25 46E30 PDF BibTeX XML Cite \textit{S. Z. Jafarov}, Mat. Zh. 21, No. 2, 47--56 (2021; Zbl 07481086) 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
Babenko, A. G.; Kryakin, Yu. V. On the norms of Boman-Shapiro difference operators. (English. Russian original) Zbl 1482.41004 Proc. Steklov Inst. Math. 315, Suppl. 1, S55-S66 (2021); translation from Tr. Inst. Mat. Mekh. (Ekaterinburg) 26, No. 4, 64-75 (2020). MSC: 41A17 41A44 47B39 PDF BibTeX XML Cite \textit{A. G. Babenko} and \textit{Yu. V. Kryakin}, Proc. Steklov Inst. Math. 315, S55--S66 (2021; Zbl 1482.41004); translation from Tr. Inst. Mat. Mekh. (Ekaterinburg) 26, No. 4, 64--75 (2020) Full Text: DOI OpenURL
Nicolas, Chevallier Gauss lattices and complex continued fractions. (English) Zbl 07465759 Pure Appl. Math. Q. 17, No. 5, 1785-1860 (2021). Reviewer: Oleg Karpenkov (Liverpool) MSC: 11J04 11J70 11H06 PDF BibTeX XML Cite \textit{C. Nicolas}, Pure Appl. Math. Q. 17, No. 5, 1785--1860 (2021; Zbl 07465759) Full Text: DOI arXiv 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
Mahmoud, Mansour; Anis, Mona Some Padé approximations and inequalities for the complete elliptic integrals of the first kind. (English) Zbl 07465016 J. Inequal. Appl. 2021, Paper No. 37, 13 p. (2021). MSC: 33E05 26D15 41A21 PDF BibTeX XML Cite \textit{M. Mahmoud} and \textit{M. Anis}, J. Inequal. Appl. 2021, Paper No. 37, 13 p. (2021; Zbl 07465016) Full Text: DOI OpenURL
Urbaniak, Ilona A.; Kunze, Amelia; Li, Dongchang; Torre, Davide La; Vrscay, Edward R. The use of intensity-dependent weight functions to “Weberize” \(L^2\)-based methods of signal and image approximation. (English) Zbl 1482.91172 Optim. Eng. 22, No. 4, 2349-2365 (2021). MSC: 91E30 46N60 PDF BibTeX XML Cite \textit{I. A. Urbaniak} et al., Optim. Eng. 22, No. 4, 2349--2365 (2021; Zbl 1482.91172) Full Text: DOI OpenURL
Li, Dongchang; La Torre, Davide; Vrscay, Edward R. The intensity-based measure approach to “Weberize” \(L^2\)-based methods of signal and image approximation. (English) Zbl 1481.94021 Optim. Eng. 22, No. 4, 2321-2347 (2021). MSC: 94A08 94A12 39B12 39B22 PDF BibTeX XML Cite \textit{D. Li} et al., Optim. Eng. 22, No. 4, 2321--2347 (2021; Zbl 1481.94021) 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
Akobirshoev, M. O. mean-square approximation by “angle” in the space \(L_{2,\mu}(\mathbb{R}^2)\) with the Chebyshev-Hermite weight. (English. Russian original) Zbl 07457395 Russ. Math. 65, No. 9, 1-9 (2021); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2021, No. 9, 3-12 (2021). MSC: 41Axx 42Axx 33-XX PDF BibTeX XML Cite \textit{M. O. Akobirshoev}, Russ. Math. 65, No. 9, 1--9 (2021; Zbl 07457395); translation from Izv. Vyssh. Uchebn. Zaved., Mat. 2021, No. 9, 3--12 (2021) Full Text: DOI OpenURL
Alzer, Horst; Kwong, Man Kam On some inequalities for sine polynomials. (English) Zbl 07457036 Jaen J. Approx. 12, 89-109 (2021). MSC: 26A48 26D05 26D15 33B10 33C05 41A44 PDF BibTeX XML Cite \textit{H. Alzer} and \textit{M. K. Kwong}, Jaen J. Approx. 12, 89--109 (2021; Zbl 07457036) Full Text: Link 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
Tsar’kov, I. G. Uniform convexity in nonsymmetric spaces. (English. Russian original) Zbl 07455556 Math. Notes 110, No. 5, 773-783 (2021); translation from Mat. Zametki 110, No. 5, 773-785 (2021). Reviewer: Stefan Cobzaş (Cluj-Napoca) MSC: 46B20 46E30 41A65 PDF BibTeX XML Cite \textit{I. G. Tsar'kov}, Math. Notes 110, No. 5, 773--783 (2021; Zbl 07455556); translation from Mat. Zametki 110, No. 5, 773--785 (2021) Full Text: DOI OpenURL
Rhee, Hyang Joo Expansion theory for the two-sided best simultaneous approximations. (English) Zbl 07452333 J. Appl. Math. Inform. 39, No. 3-4, 437-442 (2021). MSC: 41A28 41A65 54C60 PDF BibTeX XML Cite \textit{H. J. Rhee}, J. Appl. Math. Inform. 39, No. 3--4, 437--442 (2021; Zbl 07452333) 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
Park, Sehie Best approximations for multimaps on abstract convex spaces. (English) Zbl 07450974 Nonlinear Funct. Anal. Appl. 26, No. 1, 165-175 (2021). MSC: 41A65 46A03 47H10 49J53 54C60 54H25 91A11 91B02 PDF BibTeX XML Cite \textit{S. Park}, Nonlinear Funct. Anal. Appl. 26, No. 1, 165--175 (2021; Zbl 07450974) Full Text: Link OpenURL
Lei, Xuehong; Xu, Yunxia Upper and lower bounds for the \(Z\)-spectral radius of fourth-order weakly symmetric nonnegative tensors and their applications. (Chinese. English summary) Zbl 07448478 J. Lanzhou Univ. Technol. 47, No. 3, 162-166 (2021). MSC: 15A18 15A72 15A69 PDF BibTeX XML Cite \textit{X. Lei} and \textit{Y. Xu}, J. Lanzhou Univ. Technol. 47, No. 3, 162--166 (2021; Zbl 07448478) OpenURL
Nakov, S.; Toulopoulos, I. Convergence estimates of finite elements for a class of quasilinear elliptic problems. (English) Zbl 07447589 Comput. Math. Appl. 104, 87-112 (2021). MSC: 65-XX 35-XX PDF BibTeX XML Cite \textit{S. Nakov} and \textit{I. Toulopoulos}, Comput. Math. Appl. 104, 87--112 (2021; Zbl 07447589) Full Text: DOI OpenURL
Liu, Wenjie; Wang, Li-Lian; Wu, Boying Optimal error estimates for Legendre expansions of singular functions with fractional derivatives of bounded variation. (English) Zbl 07445234 Adv. Comput. Math. 47, No. 6, Paper No. 79, 32 p. (2021). MSC: 41A10 41A25 41A44 65N35 PDF BibTeX XML Cite \textit{W. Liu} et al., Adv. Comput. Math. 47, No. 6, Paper No. 79, 32 p. (2021; Zbl 07445234) Full Text: DOI arXiv OpenURL
Falcó, Antonio; Hackbusch, Wolfgang; Nouy, Anthony Tree-based tensor formats. (English) Zbl 1479.15026 S\(\vec{\text{e}}\)MA J. 78, No. 2, 159-173 (2021). MSC: 15A69 46B28 46A32 PDF BibTeX XML Cite \textit{A. Falcó} et al., S\(\vec{\text{e}}\)MA J. 78, No. 2, 159--173 (2021; Zbl 1479.15026) 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
Puangpee, Jenwit; Suantai, Suthep Algorithms for common best proximity points of the global minimization problem in Hilbert spaces. (English) Zbl 07439480 J. Nonlinear Convex Anal. 22, No. 6, 1133-1146 (2021). MSC: 41A29 47H09 PDF BibTeX XML Cite \textit{J. Puangpee} and \textit{S. Suantai}, J. Nonlinear Convex Anal. 22, No. 6, 1133--1146 (2021; Zbl 07439480) Full Text: Link OpenURL
Tkachenko, M. Ye.; Traktynska, V. M. The uniqueness of the best non-symmetric \(L_1\)-approximant for continuous functions with values in \( \mathbb{R}^m_p\). (English) Zbl 07437703 Res. Math. 29, No. 1, 31-42 (2021). MSC: 41Axx PDF BibTeX XML Cite \textit{M. Ye. Tkachenko} and \textit{V. M. Traktynska}, Res. Math. 29, No. 1, 31--42 (2021; Zbl 07437703) Full Text: DOI OpenURL
Kryvonos, Liudmyla “Near-best” polynomial approximation of harmonic functions on compact sets in \(\mathbb{C}\). (English) Zbl 07436513 J. Approx. Theory 272, Article ID 105643, 11 p. (2021). Reviewer: Zoltán Finta (Cluj-Napoca) MSC: 41A10 30E10 PDF BibTeX XML Cite \textit{L. Kryvonos}, J. Approx. Theory 272, Article ID 105643, 11 p. (2021; Zbl 07436513) 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
Carstensen, Carsten; Nataraj, Neela A priori and a posteriori error analysis of the Crouzeix-Raviart and Morley FEM with original and modified right-hand sides. (English) Zbl 1476.65294 Comput. Methods Appl. Math. 21, No. 2, 289-315 (2021). MSC: 65N30 65N12 65N15 65N50 PDF BibTeX XML Cite \textit{C. Carstensen} and \textit{N. Nataraj}, Comput. Methods Appl. Math. 21, No. 2, 289--315 (2021; Zbl 1476.65294) Full Text: DOI arXiv OpenURL
Shabozov, M. Sh. Inequalities between best polynomial approximants and smoothness characteristics of functions in \(L_2\). (English. Russian original) Zbl 1482.41007 Math. Notes 110, No. 3, 432-439 (2021); translation from Mat. Zametki 110, No. 3, 450-458 (2021). MSC: 41A17 42A05 PDF BibTeX XML Cite \textit{M. Sh. Shabozov}, Math. Notes 110, No. 3, 432--439 (2021; Zbl 1482.41007); translation from Mat. Zametki 110, No. 3, 450--458 (2021) 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
Aydin, İsmail; Akgün, Ramazan Weighted variable exponent grand Lebesgue spaces and inequalities of approximation. (English) Zbl 07424380 Hacet. J. Math. Stat. 50, No. 1, 199-215 (2021). MSC: 46E30 42A10 PDF BibTeX XML Cite \textit{İ. Aydin} and \textit{R. Akgün}, Hacet. J. Math. Stat. 50, No. 1, 199--215 (2021; Zbl 07424380) Full Text: DOI OpenURL
Kolomoitsev, Yurii; Skopina, Maria Approximation by multivariate quasi-projection operators and Fourier multipliers. (English) Zbl 07423503 Appl. Math. Comput. 400, Article ID 125955, 18 p. (2021). MSC: 41A17 41A25 42B10 94A20 PDF BibTeX XML Cite \textit{Y. Kolomoitsev} and \textit{M. Skopina}, Appl. Math. Comput. 400, Article ID 125955, 18 p. (2021; Zbl 07423503) Full Text: DOI arXiv OpenURL
Sarvari, Ali Asghar; Mazaheri, Hamid; Khademzadeh, Hamid Reza The best proximity pair focusing on monotonicity and \(T\)-absolutely direct sets. (English) Zbl 1481.41018 J. Math. Ext. 15, No. 1, 15-27 (2021). MSC: 41A65 41A52 PDF BibTeX XML Cite \textit{A. A. Sarvari} et al., J. Math. Ext. 15, No. 1, 15--27 (2021; Zbl 1481.41018) Full Text: Link 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
Starovojtov, A. P.; Kechko, E. P.; Kasabuczkij, A. F. Asymptotic properties of trigonometric Padé approximations. (Russian. English summary) Zbl 1480.41004 Izv. Gomel. Gos. Univ. Im. F. Skoriny 2021, No. 3(126), 132-135 (2021). MSC: 41A21 41A25 PDF BibTeX XML Cite \textit{A. P. Starovojtov} et al., Izv. Gomel. Gos. Univ. Im. F. Skoriny 2021, No. 3(126), 132--135 (2021; Zbl 1480.41004) OpenURL
Zhang, Li-qiang; Yu, Deng-hui; Yu, Chang-shui The optimal approximation of qubit states with limited quantum states. (English) Zbl 07409599 Phys. Lett., A 398, Article ID 127286, 11 p. (2021). MSC: 81-XX 82-XX PDF BibTeX XML Cite \textit{L.-q. Zhang} et al., Phys. Lett., A 398, Article ID 127286, 11 p. (2021; Zbl 07409599) Full Text: DOI arXiv OpenURL
Mizuguchi, Makoto; Nakao, Mitsuhiro T.; Sekine, Kouta; Oishi, Shin’ichi Error constants for the semi-discrete Galerkin approximation of the linear heat equation. (English) Zbl 07408889 J. Sci. Comput. 89, No. 2, Paper No. 34, 9 p. (2021). MSC: 65N15 65N30 35K05 PDF BibTeX XML Cite \textit{M. Mizuguchi} et al., J. Sci. Comput. 89, No. 2, Paper No. 34, 9 p. (2021; Zbl 07408889) Full Text: DOI 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
Serdyuk, A. S.; Shydlich, A. L. Problems of approximation theory in abstract linear spaces. (Ukrainian. English summary) Zbl 07402552 Zb. Pr. Inst. Mat. NAN Ukr. 18, No. 1, 594-643 (2021). MSC: 41A65 41A17 41A29 41A46 42A10 PDF BibTeX XML Cite \textit{A. S. Serdyuk} and \textit{A. L. Shydlich}, Zb. Pr. Inst. Mat. NAN Ukr. 18, No. 1, 594--643 (2021; Zbl 07402552) Full Text: arXiv OpenURL
Kolomoitsev, Yurii; Prestin, Jürgen Approximation properties of periodic multivariate quasi-interpolation operators. (English) Zbl 1475.41008 J. Approx. Theory 270, Article ID 105631, 24 p. (2021). Reviewer: Martin D. Buhmann (Gießen) MSC: 41A35 41A25 41A27 42A10 42A15 PDF BibTeX XML Cite \textit{Y. Kolomoitsev} and \textit{J. Prestin}, J. Approx. Theory 270, Article ID 105631, 24 p. (2021; Zbl 1475.41008) Full Text: DOI arXiv OpenURL
Simonov, Boris V. Estimates of functions with transformed double Fourier series. (English) Zbl 07399087 Stud. Sci. Math. Hung. 58, No. 1, 32-83 (2021). MSC: 46E30 42B05 PDF BibTeX XML Cite \textit{B. V. Simonov}, Stud. Sci. Math. Hung. 58, No. 1, 32--83 (2021; Zbl 07399087) Full Text: DOI OpenURL
Guessab, Allal; Semisalov, Boris Optimal general Hermite-Hadamard-type inequalities in a ball and their applications in multidimensional numerical integration. (English) Zbl 07398295 Appl. Numer. Math. 170, 83-108 (2021). MSC: 65Nxx 35Jxx 65Dxx PDF BibTeX XML Cite \textit{A. Guessab} and \textit{B. Semisalov}, Appl. Numer. Math. 170, 83--108 (2021; Zbl 07398295) Full Text: DOI OpenURL
Abdullayev, Fahreddin; Chaichenko, Stanislav; Imashkyzy, Meerim; Shidlich, Andrii Jackson-type inequalities and widths of functional classes in the Musielak-Orlicz type spaces. (English) Zbl 1477.41004 Rocky Mt. J. Math. 51, No. 4, 1143-1155 (2021). Reviewer: D. K. Ugulava (Tbilisi) MSC: 41A17 42A32 PDF BibTeX XML Cite \textit{F. Abdullayev} et al., Rocky Mt. J. Math. 51, No. 4, 1143--1155 (2021; Zbl 1477.41004) 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
Sain, Debmalya On best approximations to compact operators. (English) Zbl 1483.46015 Proc. Am. Math. Soc. 149, No. 10, 4273-4286 (2021). Reviewer: T.S.S.R.K. Rao (Bangalore) MSC: 46B28 46B20 PDF BibTeX XML Cite \textit{D. Sain}, Proc. Am. Math. Soc. 149, No. 10, 4273--4286 (2021; Zbl 1483.46015) Full Text: DOI arXiv OpenURL
Aceska, Roza; Kim, Yeon Hyang Time-variant system approximation via later-time samples. (English) Zbl 07388329 Fasshauer, Gregory E. (ed.) et al., Approximation theory XVI. Proceedings of the international conference, Nashville, TN, USA, May 19–22, 2019. Cham: Springer. Springer Proc. Math. Stat. 336, 1-9 (2021). MSC: 65M32 35K05 35J05 80A23 35R07 35R30 PDF BibTeX XML Cite \textit{R. Aceska} and \textit{Y. H. Kim}, Springer Proc. Math. Stat. 336, 1--9 (2021; Zbl 07388329) Full Text: DOI OpenURL