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
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
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
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
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
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
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
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
Jahn, Thomas; Ullrich, Tino On the optimal constants in the two-sided Stechkin inequalities. (English) Zbl 1473.41002 J. Approx. Theory 269, Article ID 105607, 25 p. (2021). Reviewer: D. K. Ugulava (Tbilisi) MSC: 41A17 41A44 46E30 PDF BibTeX XML Cite \textit{T. Jahn} and \textit{T. Ullrich}, J. Approx. Theory 269, Article ID 105607, 25 p. (2021; Zbl 1473.41002) 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
Babenko, V.; Babenko, V.; Kovalenko, O.; Polishchuk, M. Optimal recovery of operators in function \(L\)-spaces. (English) Zbl 07364735 Anal. Math. 47, No. 1, 13-32 (2021). Reviewer: Stefan Cobzaş (Cluj-Napoca) MSC: 46E40 41A65 26D10 41A44 46A19 PDF BibTeX XML Cite \textit{V. Babenko} et al., Anal. Math. 47, No. 1, 13--32 (2021; Zbl 07364735) Full Text: DOI OpenURL
Osipenko, K. Yu. Inequalities for derivatives with the Fourier transform. (English) Zbl 1475.42015 Appl. Comput. Harmon. Anal. 53, 132-150 (2021). Reviewer: Elijah Liflyand (Ramat-Gan) MSC: 42A38 26D10 41A44 PDF BibTeX XML Cite \textit{K. Yu. Osipenko}, Appl. Comput. Harmon. Anal. 53, 132--150 (2021; Zbl 1475.42015) Full Text: DOI OpenURL
Abdullayev, Fahreddin; Chaichenko, Stanislav; Shidlich, Andrii Direct and inverse approximation theorems of functions in the Musielak-Orlicz type spaces. (English) Zbl 1466.41008 Math. Inequal. Appl. 24, No. 2, 323-336 (2021). MSC: 41A27 41A44 42A16 PDF BibTeX XML Cite \textit{F. Abdullayev} et al., Math. Inequal. Appl. 24, No. 2, 323--336 (2021; Zbl 1466.41008) Full Text: DOI arXiv 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
Vinogradov, O. L. Classes of convolutions with a singular family of kernels: sharp constants for approximation by spaces of shifts. (English. Russian original) Zbl 1462.41005 St. Petersbg. Math. J. 32, No. 2, 233-260 (2021); translation from Algebra Anal. 32, No. 2, 45-84 (2020). Reviewer: Martin D. Buhmann (Gießen) MSC: 41A17 41A44 41A25 41A45 PDF BibTeX XML Cite \textit{O. L. Vinogradov}, St. Petersbg. Math. J. 32, No. 2, 233--260 (2021; Zbl 1462.41005); translation from Algebra Anal. 32, No. 2, 45--84 (2020) Full Text: DOI OpenURL
Chen, Yifan; Hou, Thomas Y. Function approximation via the subsampled Poincaré inequality. (English) Zbl 1458.35008 Discrete Contin. Dyn. Syst. 41, No. 1, 169-199 (2021). MSC: 35A23 41A44 65D05 65D07 62G05 PDF BibTeX XML Cite \textit{Y. Chen} and \textit{T. Y. Hou}, Discrete Contin. Dyn. Syst. 41, No. 1, 169--199 (2021; Zbl 1458.35008) Full Text: DOI arXiv OpenURL
Volkov, Yu. S. One problem of extremal functional interpolation and the Favard constants. (English. Russian original) Zbl 07424669 Dokl. Math. 102, No. 3, 41A44474-477 (2020); translation from Dokl. Ross. Akad. Nauk, Mat. Inform. Protsessy Upr. 495, 34-37 (2020). MSC: 41A05 11B68 41A44 PDF BibTeX XML Cite \textit{Yu. S. Volkov}, Dokl. Math. 102, No. 3, 41A44474--477 (2020; Zbl 07424669); translation from Dokl. Ross. Akad. Nauk, Mat. Inform. Protsessy Upr. 495, 34--37 (2020) Full Text: DOI OpenURL
Gorbachev, Dmitriĭ Viktorovich; Dobrovol’skiĭ, Nikolaĭ Nikolaevich Nikolskii-Bernstein constants in \(L^p\) on the sphere with Dunkl weight. (Russian. English summary) Zbl 1476.41012 Chebyshevskiĭ Sb. 21, No. 4(76), 302-307 (2020). MSC: 41A44 41A81 42B10 44A15 PDF BibTeX XML Cite \textit{D. V. Gorbachev} and \textit{N. N. Dobrovol'skiĭ}, Chebyshevskiĭ Sb. 21, No. 4(76), 302--307 (2020; Zbl 1476.41012) Full Text: MNR OpenURL
Volkov, Yu. S. Efficient computation of Favard constants and their connection to Euler polynomials and numbers. (English) Zbl 07308388 Sib. Èlektron. Mat. Izv. 17, 1921-1942 (2020). MSC: 11B68 41A05 41A44 PDF BibTeX XML Cite \textit{Yu. S. Volkov}, Sib. Èlektron. Mat. Izv. 17, 1921--1942 (2020; Zbl 07308388) Full Text: DOI OpenURL
Pak, Hee Chul Sobolev trace inequality on \(W^{s, q}( {\mathbb R}^n )\). (English) Zbl 1469.46032 Bull. Korean Math. Soc. 57, No. 5, 1143-1149 (2020). MSC: 46E35 41A44 26A33 PDF BibTeX XML Cite \textit{H. C. Pak}, Bull. Korean Math. Soc. 57, No. 5, 1143--1149 (2020; Zbl 1469.46032) Full Text: DOI arXiv OpenURL
Kovalenko, O. On maximally oscillating perfect splines and some of their extremal properties. (English) Zbl 07301148 Anal. Math. 46, No. 3, 555-577 (2020). Reviewer: Constantin Niculescu (Craiova) MSC: 41A15 26D10 41A17 41A44 PDF BibTeX XML Cite \textit{O. Kovalenko}, Anal. Math. 46, No. 3, 555--577 (2020; Zbl 07301148) Full Text: DOI arXiv 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
Alpan, Gökalp; Zinchenko, Maxim On the Widom factors for \(L_p\) extremal polynomials. (English) Zbl 1452.41003 J. Approx. Theory 259, Article ID 105480, 18 p. (2020). Reviewer: Klaus Schiefermayr (Wels) MSC: 41A17 33C45 41A44 42C05 PDF BibTeX XML Cite \textit{G. Alpan} and \textit{M. Zinchenko}, J. Approx. Theory 259, Article ID 105480, 18 p. (2020; Zbl 1452.41003) Full Text: DOI arXiv OpenURL
Babenko, Vladyslav; Babenko, Vira; Kovalenko, Oleg Optimal recovery of monotone operators in partially ordered \(L\)-spaces. (English) Zbl 1448.41030 Numer. Funct. Anal. Optim. 41, No. 11, 1373-1397 (2020). Reviewer: Stefan Cobzaş (Cluj-Napoca) MSC: 41A65 26D10 46E40 41A44 PDF BibTeX XML Cite \textit{V. Babenko} et al., Numer. Funct. Anal. Optim. 41, No. 11, 1373--1397 (2020; Zbl 1448.41030) Full Text: DOI OpenURL
Liu, Zehong; Lu, Wanting; Xu, Guiqiao Simultaneous approximation of Birkhoff interpolation and the associated sharp inequalities. (English) Zbl 1446.41010 Int. J. Wavelets Multiresolut. Inf. Process. 18, No. 4, Article ID 2050021, 24 p. (2020). Reviewer: Yuri A. Farkov (Moskva) MSC: 41A44 41A80 PDF BibTeX XML Cite \textit{Z. Liu} et al., Int. J. Wavelets Multiresolut. Inf. Process. 18, No. 4, Article ID 2050021, 24 p. (2020; Zbl 1446.41010) Full Text: DOI OpenURL
Babenko, Vladyslav; Babenko, Yuliya; Kovalenko, Oleg On multivariate Ostrowski type inequalities and their applications. (English) Zbl 1445.26017 Math. Inequal. Appl. 23, No. 2, 569-583 (2020). Reviewer: Sorin Gheorghe Gal (Oradea) MSC: 26D10 41A17 41A44 41A45 PDF BibTeX XML Cite \textit{V. Babenko} et al., Math. Inequal. Appl. 23, No. 2, 569--583 (2020; Zbl 1445.26017) Full Text: DOI OpenURL
Solodov, A. P. Exact constants in Telyakovskii’s two-sided estimate of the sum of a sine series with convex sequence of coefficients. (English. Russian original) Zbl 1442.42005 Math. Notes 107, No. 6, 988-1001 (2020); translation from Mat. Zametki 107, No. 6, 906-921 (2020). MSC: 42A05 41A44 PDF BibTeX XML Cite \textit{A. P. Solodov}, Math. Notes 107, No. 6, 988--1001 (2020; Zbl 1442.42005); translation from Mat. Zametki 107, No. 6, 906--921 (2020) Full Text: DOI OpenURL
Cotsiolis, Athanase; Labropoulos, Nikos Ledoux-type rigidity results on manifolds with boundary in the presence of symmetries. (English) Zbl 1442.53031 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 198, Article ID 111887, 22 p. (2020). Reviewer: Georges Habib (Beirut) MSC: 53C24 58D19 41A44 35B33 PDF BibTeX XML Cite \textit{A. Cotsiolis} and \textit{N. Labropoulos}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 198, Article ID 111887, 22 p. (2020; Zbl 1442.53031) Full Text: DOI OpenURL
Sande, Espen; Manni, Carla; Speleers, Hendrik Explicit error estimates for spline approximation of arbitrary smoothness in isogeometric analysis. (English) Zbl 1483.65026 Numer. Math. 144, No. 4, 889-929 (2020). Reviewer: Deepesh Toshniwal (Delft) MSC: 65D07 41A15 41A44 PDF BibTeX XML Cite \textit{E. Sande} et al., Numer. Math. 144, No. 4, 889--929 (2020; Zbl 1483.65026) Full Text: DOI arXiv OpenURL
Ganzburg, Michael I. Sharp constants of approximation theory. I. Multivariate Bernstein-Nikolskii type inequalities. (English) Zbl 1434.41005 J. Fourier Anal. Appl. 26, No. 1, Paper No. 11, 20 p. (2020). MSC: 41A17 41A44 PDF BibTeX XML Cite \textit{M. I. Ganzburg}, J. Fourier Anal. Appl. 26, No. 1, Paper No. 11, 20 p. (2020; Zbl 1434.41005) Full Text: DOI arXiv OpenURL
Xu, Guiqiao; Liu, Zehong; Lu, Wanting A kind of sharp Wirtinger inequality. (English) Zbl 07459194 J. Inequal. Appl. 2019, Paper No. 166, 15 p. (2019). MSC: 41A44 41A80 PDF BibTeX XML Cite \textit{G. Xu} et al., J. Inequal. Appl. 2019, Paper No. 166, 15 p. (2019; Zbl 07459194) Full Text: DOI OpenURL
Pasko, A. M. The Betti numbers of the space \( \mathbb{C}\Omega_3\). (English) Zbl 07437687 Res. Math. 27, No. 2, 28-31 (2019). MSC: 41A10 41A44 46E20 PDF BibTeX XML Cite \textit{A. M. Pasko}, Res. Math. 27, No. 2, 28--31 (2019; Zbl 07437687) Full Text: DOI OpenURL
Pasko, A. M. The homology groups of the space \(\Omega_n(m)\). (English) Zbl 07437680 Res. Math. 27, No. 1, 39-44 (2019). MSC: 41A10 41A44 46E20 PDF BibTeX XML Cite \textit{A. M. Pasko}, Res. Math. 27, No. 1, 39--44 (2019; Zbl 07437680) Full Text: DOI OpenURL
Danchenko, K. A.; Kofanov, V. A. Extremal problems for non-periodic splines on real domain and their derivatives. (Ukrainian. English summary) Zbl 1483.41002 Res. Math. 27, No. 1, 28-38 (2019). MSC: 41A15 41A17 41A44 PDF BibTeX XML Cite \textit{K. A. Danchenko} and \textit{V. A. Kofanov}, Res. Math. 27, No. 1, 28--38 (2019; Zbl 1483.41002) Full Text: DOI OpenURL
Asadova, E. V.; Kofanov, V. A. The Bojanov-Naidenov problem for trigonometric polynomials and periodic splines. (English) Zbl 1483.41003 Res. Math. 27, No. 1, 3-13 (2019). MSC: 41A17 41A15 41A44 PDF BibTeX XML Cite \textit{E. V. Asadova} and \textit{V. A. Kofanov}, Res. Math. 27, No. 1, 3--13 (2019; Zbl 1483.41003) Full Text: DOI OpenURL
Jantsch, Peter; Webster, Clayton G.; Zhang, Guannan On the Lebesgue constant of weighted Leja points for Lagrange interpolation on unbounded domains. (English) Zbl 1465.41001 IMA J. Numer. Anal. 39, No. 2, 1039-1057 (2019). MSC: 41A05 41A44 PDF BibTeX XML Cite \textit{P. Jantsch} et al., IMA J. Numer. Anal. 39, No. 2, 1039--1057 (2019; Zbl 1465.41001) Full Text: DOI arXiv OpenURL
Klurman, Oleksiy; Zadeh, Safoura V. Markov’s problem for \(k\)-absolutely monotone polynomials and applications. (English) Zbl 1443.41007 Jaen J. Approx. 11, No. 1-2, 139-149 (2019). MSC: 41A17 41A29 41A44 PDF BibTeX XML Cite \textit{O. Klurman} and \textit{S. Zadeh}, Jaen J. Approx. 11, No. 1--2, 139--149 (2019; Zbl 1443.41007) Full Text: Link Link OpenURL
Shabozov, M. Sh.; Langarshoev, M. R. Best linear approximation methods for some classes of analytic functions on the unit disk. (English. Russian original) Zbl 1444.41006 Sib. Math. J. 60, No. 6, 1101-1108 (2019); translation from Sib. Mat. Zh. 60, No. 6, 1414-1423 (2019). Reviewer: Richard A. Zalik (Auburn) MSC: 41A44 30H20 41A46 PDF BibTeX XML Cite \textit{M. Sh. Shabozov} and \textit{M. R. Langarshoev}, Sib. Math. J. 60, No. 6, 1101--1108 (2019; Zbl 1444.41006); translation from Sib. Mat. Zh. 60, No. 6, 1414--1423 (2019) Full Text: DOI OpenURL
Rutka, Przemysław; Smarzewski, Ryszard The Szegő-Markov-Bernstein inequalities and barycentric representations of the osculatory interpolating operators for classical iterated weights. (English) Zbl 1439.41008 J. Math. Inequal. 13, No. 4, 983-999 (2019). Reviewer: Yamilet del Carmen Quintana Mato (Caracas) MSC: 41A17 33C45 41A44 65D05 65D32 PDF BibTeX XML Cite \textit{P. Rutka} and \textit{R. Smarzewski}, J. Math. Inequal. 13, No. 4, 983--999 (2019; Zbl 1439.41008) Full Text: DOI OpenURL
Sande, Espen; Manni, Carla; Speleers, Hendrik Sharp error estimates for spline approximation: explicit constants, \(n\)-widths, and eigenfunction convergence. (English) Zbl 1428.41010 Math. Models Methods Appl. Sci. 29, No. 6, 1175-1205 (2019). MSC: 41A15 41A27 41A44 65D07 PDF BibTeX XML Cite \textit{E. Sande} et al., Math. Models Methods Appl. Sci. 29, No. 6, 1175--1205 (2019; Zbl 1428.41010) Full Text: DOI arXiv OpenURL
Nasibov, Sh. M.; Veling, E. J. M. Upper and lower bounds for the optimal constant in the extended Sobolev inequality. Derivation and numerical results. (English) Zbl 1428.26047 J. Math. Inequal. 13, No. 3, Article No. 13-52, 753-778 (2019). MSC: 26D15 41A44 PDF BibTeX XML Cite \textit{Sh. M. Nasibov} and \textit{E. J. M. Veling}, J. Math. Inequal. 13, No. 3, Article No. 13--52, 753--778 (2019; Zbl 1428.26047) Full Text: DOI OpenURL
Gonçalves, Felipe Orthogonal polynomials and sharp estimates for the Schrödinger equation. (English) Zbl 1427.42030 Int. Math. Res. Not. 2019, No. 8, 2356-2383 (2019). MSC: 42B37 42C05 41A44 33C45 PDF BibTeX XML Cite \textit{F. Gonçalves}, Int. Math. Res. Not. 2019, No. 8, 2356--2383 (2019; Zbl 1427.42030) Full Text: DOI arXiv OpenURL
Bressan, Andrea; Sande, Espen Approximation in FEM, DG and IGA: a theoretical comparison. (English) Zbl 1428.41009 Numer. Math. 143, No. 4, 923-942 (2019). MSC: 41A15 41A44 65D07 PDF BibTeX XML Cite \textit{A. Bressan} and \textit{E. Sande}, Numer. Math. 143, No. 4, 923--942 (2019; Zbl 1428.41009) Full Text: DOI arXiv OpenURL
Vinogradov, O. L. An exact inequality of Jackson-Chernykh type for spline approximations of periodic functions. (English. Russian original) Zbl 1459.41003 Sib. Math. J. 60, No. 3, 412-428 (2019); translation from Sib. Mat. Zh. 60, No. 3, 537-555 (2019). Reviewer: D. K. Ugulava (Tbilisi) MSC: 41A17 41A15 41A44 PDF BibTeX XML Cite \textit{O. L. Vinogradov}, Sib. Math. J. 60, No. 3, 412--428 (2019; Zbl 1459.41003); translation from Sib. Mat. Zh. 60, No. 3, 537--555 (2019) Full Text: DOI OpenURL
Takemura, Kazuo; Kametaka, Yoshinori Sharp constants of discrete Sobolev inequalities on a cyclic rectangular lattice. (English) Zbl 1423.05104 Far East J. Math. Sci. (FJMS) 112, No. 2, 175-194 (2019). MSC: 05C50 41A44 46E39 PDF BibTeX XML Cite \textit{K. Takemura} and \textit{Y. Kametaka}, Far East J. Math. Sci. (FJMS) 112, No. 2, 175--194 (2019; Zbl 1423.05104) Full Text: DOI OpenURL
Ioku, Norisuke Attainability of the best Sobolev constant in a ball. (English) Zbl 1439.46026 Math. Ann. 375, No. 1-2, 1-16 (2019). MSC: 46E35 26D15 41A44 58J70 PDF BibTeX XML Cite \textit{N. Ioku}, Math. Ann. 375, No. 1--2, 1--16 (2019; Zbl 1439.46026) Full Text: DOI arXiv OpenURL
Xu, G. Q.; Liu, Y. P.; Xiong, L. Y. Exact constants for simultaneous approximation of Sobolev classes by piecewise Hermite interpolation. (English) Zbl 1438.41043 Anal. Math. 45, No. 3, 621-645 (2019). Reviewer: Antonio López-Carmona (Granada) MSC: 41A44 41A80 PDF BibTeX XML Cite \textit{G. Q. Xu} et al., Anal. Math. 45, No. 3, 621--645 (2019; Zbl 1438.41043) Full Text: DOI OpenURL
Vakarchuk, S. B. Generalized characteristics of smoothness and some extreme problems of the approximation theory of functions in the space \(L_2(\mathbb{R})\). I. (English. Russian original) Zbl 1428.41015 Ukr. Math. J. 70, No. 9, 1345-1374 (2019); translation from Ukr. Mat. Zh. 70, No. 9, 1166-1191 (2018). Reviewer: Stefan Cobzaş (Cluj-Napoca) MSC: 41A17 41A30 41A44 41A65 PDF BibTeX XML Cite \textit{S. B. Vakarchuk}, Ukr. Math. J. 70, No. 9, 1345--1374 (2019; Zbl 1428.41015); translation from Ukr. Mat. Zh. 70, No. 9, 1166--1191 (2018) Full Text: DOI OpenURL
Vinogradov, O. L. Sharp constants for approximations of convolution classes with an integrable kernel by spaces of shifts. (English. Russian original) Zbl 1423.41016 St. Petersbg. Math. J. 30, No. 5, 841-867 (2019); translation from Algebra Anal. 30, No. 5, 112-148 (2018). MSC: 41A17 41A44 PDF BibTeX XML Cite \textit{O. L. Vinogradov}, St. Petersbg. Math. J. 30, No. 5, 841--867 (2019; Zbl 1423.41016); translation from Algebra Anal. 30, No. 5, 112--148 (2018) Full Text: DOI OpenURL
Floater, Michael S.; Sande, Espen Optimal spline spaces for \(L^2\ n\)-width problems with boundary conditions. (English) Zbl 1416.41007 Constr. Approx. 50, No. 1, 1-18 (2019). Reviewer: Martin D. Buhmann (Gießen) MSC: 41A15 41A44 47G10 PDF BibTeX XML Cite \textit{M. S. Floater} and \textit{E. Sande}, Constr. Approx. 50, No. 1, 1--18 (2019; Zbl 1416.41007) Full Text: DOI arXiv OpenURL
Păltănea, Radu; Smuc, Mihaela Sharp estimates of asymptotic error of approximation by general positive linear operators in terms of the first and the second moduli of continuity. (English) Zbl 1416.41030 Result. Math. 74, No. 2, Paper No. 70, 17 p. (2019). Reviewer: Ioan Raşa (Cluj-Napoca) MSC: 41A36 41A25 41A44 PDF BibTeX XML Cite \textit{R. Păltănea} and \textit{M. Smuc}, Result. Math. 74, No. 2, Paper No. 70, 17 p. (2019; Zbl 1416.41030) Full Text: DOI OpenURL
Bos, Len Markov factors on average – an \(L_2\) case. (English) Zbl 07043335 J. Approx. Theory 241, 1-10 (2019). MSC: 41A17 41A44 PDF BibTeX XML Cite \textit{L. Bos}, J. Approx. Theory 241, 1--10 (2019; Zbl 07043335) Full Text: DOI OpenURL
Rutka, Przemysław; Smarzewski, Ryszard Difference inequalities and barycentric identities for classical discrete iterated weights. (English) Zbl 1411.41012 Math. Comput. 88, No. 318, 1791-1804 (2019). Reviewer: Francisco Pérez Acosta (La Laguna) MSC: 41A17 33D45 41A44 65D05 65D32 PDF BibTeX XML Cite \textit{P. Rutka} and \textit{R. Smarzewski}, Math. Comput. 88, No. 318, 1791--1804 (2019; Zbl 1411.41012) Full Text: DOI OpenURL
Pritsker, Igor; Ramachandran, Koushik Random Bernstein-Markov factors. (English) Zbl 1481.41004 J. Math. Anal. Appl. 473, No. 1, 468-478 (2019). MSC: 41A17 30C10 41A44 60G99 PDF BibTeX XML Cite \textit{I. Pritsker} and \textit{K. Ramachandran}, J. Math. Anal. Appl. 473, No. 1, 468--478 (2019; Zbl 1481.41004) Full Text: DOI arXiv OpenURL
Gonçalves, Felipe A sharpened Strichartz inequality for radial functions. (English) Zbl 1409.42018 J. Funct. Anal. 276, No. 6, 1925-1947 (2019). Reviewer: Dong Dong (College Park) MSC: 42B37 41A44 33C45 PDF BibTeX XML Cite \textit{F. Gonçalves}, J. Funct. Anal. 276, No. 6, 1925--1947 (2019; Zbl 1409.42018) Full Text: DOI arXiv OpenURL
Gorbachëv, Dmitriĭ Viktorovich; Dobrovolskiĭ, Nikolaĭ Nikolaevich Nikolskii constants in \(L^p(\mathbb{R},|x|^{2\alpha+1}\,dx)\) spaces. (Russian. English summary) Zbl 1434.41021 Chebyshevskiĭ Sb. 19, No. 2(66), 67-79 (2018). MSC: 41A44 30D15 33C10 42B35 46E35 PDF BibTeX XML Cite \textit{D. V. Gorbachëv} and \textit{N. N. Dobrovolskiĭ}, Chebyshevskiĭ Sb. 19, No. 2(66), 67--79 (2018; Zbl 1434.41021) Full Text: DOI MNR OpenURL
Guo, Jiuhua Best constants for two classes of Hausdorff operators on the Heisenberg group. (Chinese. English summary) Zbl 1438.41042 J. Shanghai Univ., Nat. Sci. 24, No. 5, 721-729 (2018). MSC: 41A44 PDF BibTeX XML Cite \textit{J. Guo}, J. Shanghai Univ., Nat. Sci. 24, No. 5, 721--729 (2018; Zbl 1438.41042) Full Text: DOI OpenURL
Bondarenko, A. R.; Kovalenko, O. V. On the dependence of the norm of a multiply monotone function on the norms of its derivatives. (English. Ukrainian original) Zbl 1416.41012 Ukr. Math. J. 70, No. 7, 1001-1011 (2018); translation from Ukr. Mat. Zh. 70, No. 7, 867-875 (2018). Reviewer: Yamilet del Carmen Quintana Mato (Caracas) MSC: 41A17 47A30 41A44 PDF BibTeX XML Cite \textit{A. R. Bondarenko} and \textit{O. V. Kovalenko}, Ukr. Math. J. 70, No. 7, 1001--1011 (2018; Zbl 1416.41012); translation from Ukr. Mat. Zh. 70, No. 7, 867--875 (2018) Full Text: DOI OpenURL
Grabner, Peter A note on some approximation kernels on the sphere. (English) Zbl 1405.41022 Dick, Josef (ed.) et al., Contemporary computational mathematics – a celebration of the 80th birthday of Ian Sloan. In 2 volumes. Cham: Springer (ISBN 978-3-319-72455-3/hbk; 978-3-319-72456-0/ebook). 443-453 (2018). MSC: 41A63 41A44 33C45 40G05 PDF BibTeX XML Cite \textit{P. Grabner}, in: Contemporary computational mathematics -- a celebration of the 80th birthday of Ian Sloan. In 2 volumes. Cham: Springer. 443--453 (2018; Zbl 1405.41022) Full Text: DOI arXiv OpenURL
Ikhsanov, L. N. Estimates of functions, orthogonal to piecewise constant functions, in terms of the second modulus of continuity. (English. Russian original) Zbl 1401.41013 J. Math. Sci., New York 234, No. 3, 330-337 (2018); translation from Zap. Nauchn. Semin. POMI 456, 96-106 (2017). MSC: 41A17 41A44 PDF BibTeX XML Cite \textit{L. N. Ikhsanov}, J. Math. Sci., New York 234, No. 3, 330--337 (2018; Zbl 1401.41013); translation from Zap. Nauchn. Semin. POMI 456, 96--106 (2017) Full Text: DOI OpenURL
Vinogradov, O. L.; Ulitskaya, A. Yu. Sharp estimates for mean square approximations of classes of differentiable periodic functions by shift spaces. (English. Russian original) Zbl 1402.41003 Vestn. St. Petersbg. Univ., Math. 51, No. 1, 15-22 (2018); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 5(63), No. 1, 20-29 (2018). Reviewer: Alexander Ulanovskii (Stavanger) MSC: 41A17 41A44 42A10 41A30 PDF BibTeX XML Cite \textit{O. L. Vinogradov} and \textit{A. Yu. Ulitskaya}, Vestn. St. Petersbg. Univ., Math. 51, No. 1, 15--22 (2018; Zbl 1402.41003); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 5(63), No. 1, 20--29 (2018) Full Text: DOI OpenURL
Aptekarev, A. I.; Draux, A.; Tulyakov, D. N. On asymptotics of the sharp constants of the Markov-Bernshtein inequalities for the Sobolev spaces. (English) Zbl 1400.41022 Lobachevskii J. Math. 39, No. 5, 609-622 (2018). MSC: 41A44 26D05 PDF BibTeX XML Cite \textit{A. I. Aptekarev} et al., Lobachevskii J. Math. 39, No. 5, 609--622 (2018; Zbl 1400.41022) Full Text: DOI OpenURL
Guessab, Allal; Semisalov, Boris Numerical integration using integrals over hyperplane sections of simplices in a triangulation of a polytope. (English) Zbl 06940690 BIT 58, No. 3, 613-660 (2018). MSC: 65D32 33C45 41A44 PDF BibTeX XML Cite \textit{A. Guessab} and \textit{B. Semisalov}, BIT 58, No. 3, 613--660 (2018; Zbl 06940690) Full Text: DOI OpenURL
Nwaeze, Eze R.; Kermausuor, Seth; Tameru, Ana M. Time scale inequalities of the Ostrowski type for functions differentiable on the coordinates. (English) Zbl 1470.26036 Abstr. Appl. Anal. 2018, Article ID 1802578, 10 p. (2018). MSC: 26D15 26B05 26E70 41A44 PDF BibTeX XML Cite \textit{E. R. Nwaeze} et al., Abstr. Appl. Anal. 2018, Article ID 1802578, 10 p. (2018; Zbl 1470.26036) Full Text: DOI OpenURL
Foucart, Simon; Lasserre, Jean B. Determining projection constants of univariate polynomial spaces. (English) Zbl 1407.90248 J. Approx. Theory 235, 74-91 (2018). MSC: 90C22 90C47 41A44 65K05 PDF BibTeX XML Cite \textit{S. Foucart} and \textit{J. B. Lasserre}, J. Approx. Theory 235, 74--91 (2018; Zbl 1407.90248) Full Text: DOI arXiv OpenURL
Gu, Yi; Liu, Yongping Optimal recovery of multivariate functions restricted by second-order differential operator. (English) Zbl 1393.41008 Anal. Appl., Singap. 16, No. 4, 585-599 (2018). MSC: 41A44 26D10 65D15 PDF BibTeX XML Cite \textit{Y. Gu} and \textit{Y. Liu}, Anal. Appl., Singap. 16, No. 4, 585--599 (2018; Zbl 1393.41008) Full Text: DOI OpenURL
Păltănea, Radu Asymptotic constant in approximation of twice differentiable functions by a class of positive linear operators. (English) Zbl 1393.41007 Result. Math. 73, No. 2, Paper No. 64, 10 p. (2018). MSC: 41A36 41A25 41A44 PDF BibTeX XML Cite \textit{R. Păltănea}, Result. Math. 73, No. 2, Paper No. 64, 10 p. (2018; Zbl 1393.41007) Full Text: DOI OpenURL
Ganzburg, M. I. Exact errors of best approximation for complex-valued periodic functions. (English. Russian original) Zbl 1406.41009 Sb. Math. 209, No. 3, 421-431 (2018); translation from Mat. Sb. 209, No. 3, 138-149 (2018). Reviewer: Jorge Bustamante González (Puebla) MSC: 41A44 41A10 PDF BibTeX XML Cite \textit{M. I. Ganzburg}, Sb. Math. 209, No. 3, 421--431 (2018; Zbl 1406.41009); translation from Mat. Sb. 209, No. 3, 138--149 (2018) Full Text: DOI OpenURL
Arestov, V.; Babenko, A.; Deikalova, M.; Horváth, Á. Nikol’skii type inequality; Bessel weight; extremal functions; extremal constants. (English) Zbl 1424.47026 Anal. Math. 44, No. 1, 21-42 (2018). Reviewer: Radu Păltănea (Braşov) MSC: 47A30 41A44 41A17 PDF BibTeX XML Cite \textit{V. Arestov} et al., Anal. Math. 44, No. 1, 21--42 (2018; Zbl 1424.47026) Full Text: DOI OpenURL
Cotsiolis, Athanase; Labropoulos, Nikos Analytical approach of the symmetry: sharp supercritical Hardy-Sobolev inequalities and applications. (English) Zbl 1391.35014 Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 171, 134-155 (2018). MSC: 35A23 41A44 35B33 58D19 34B18 35J25 35J92 PDF BibTeX XML Cite \textit{A. Cotsiolis} and \textit{N. Labropoulos}, Nonlinear Anal., Theory Methods Appl., Ser. A, Theory Methods 171, 134--155 (2018; Zbl 1391.35014) Full Text: DOI OpenURL
Deregowska, Beata; Foucart, Simon; Lewandowska, Barbara; Skrzypek, Lesław On the norms and minimal properties of de la Vallée Poussin’s type operators. (English) Zbl 1395.42002 Monatsh. Math. 185, No. 4, 601-619 (2018). Reviewer: Włodzimierz Łenski (Poznań) MSC: 42A10 47A58 41A44 PDF BibTeX XML Cite \textit{B. Deregowska} et al., Monatsh. Math. 185, No. 4, 601--619 (2018; Zbl 1395.42002) Full Text: DOI OpenURL
Ganzburg, Michael I. Exact errors of best approximation for complex-valued nonperiodic functions. (English) Zbl 1390.41034 J. Approx. Theory 229, 1-12 (2018). Reviewer: Francisco Pérez Acosta (La Laguna) MSC: 41A44 41A30 PDF BibTeX XML Cite \textit{M. I. Ganzburg}, J. Approx. Theory 229, 1--12 (2018; Zbl 1390.41034) Full Text: DOI OpenURL
Guessab, Allal; Semisalov, Boris A multivariate version of Hammer’s inequality and its consequences in numerical integration. (English) Zbl 06859346 Result. Math. 73, No. 1, Paper No. 33, 37 p. (2018). MSC: 65D32 33C45 41A44 PDF BibTeX XML Cite \textit{A. Guessab} and \textit{B. Semisalov}, Result. Math. 73, No. 1, Paper No. 33, 37 p. (2018; Zbl 06859346) Full Text: DOI OpenURL
Chunaev, Petr; Danchenko, Vladimir Quadrature formulas with variable nodes and Jackson-Nikolskii inequalities for rational functions. (English) Zbl 1387.41015 J. Approx. Theory 228, 1-20 (2018). Reviewer: Josef Kofroň (Praha) MSC: 41A55 41A17 41A44 30E20 PDF BibTeX XML Cite \textit{P. Chunaev} and \textit{V. Danchenko}, J. Approx. Theory 228, 1--20 (2018; Zbl 1387.41015) Full Text: DOI arXiv OpenURL
Nikolov, Geno; Uluchev, Rumen Estimates for the best constant in a Markov \(L_2\)-inequality with the assistance of computer algebra. (English) Zbl 1474.41071 God. Sofiĭ. Univ., Fak. Mat. Inform. 104, 55-75 (2017). MSC: 41A44 41A10 41A17 PDF BibTeX XML Cite \textit{G. Nikolov} and \textit{R. Uluchev}, God. Sofiĭ. Univ., Fak. Mat. Inform. 104, 55--75 (2017; Zbl 1474.41071) Full Text: arXiv Link OpenURL
Zhang, Ren-Jiang Optimal asymptotic Lebesgue constant of Berrut’s rational interpolation operator for equidistant nodes. (English) Zbl 1411.41019 Appl. Math. Comput. 294, 139-145 (2017). MSC: 41A44 41A20 65D05 PDF BibTeX XML Cite \textit{R.-J. Zhang}, Appl. Math. Comput. 294, 139--145 (2017; Zbl 1411.41019) Full Text: DOI OpenURL
Hager, William W.; Hou, Hongyan; Rao, Anil V. Lebesgue constants arising in a class of collocation methods. (English) Zbl 1433.41009 IMA J. Numer. Anal. 37, No. 4, 1884-1901 (2017). MSC: 41A55 41A44 65D30 PDF BibTeX XML Cite \textit{W. W. Hager} et al., IMA J. Numer. Anal. 37, No. 4, 1884--1901 (2017; Zbl 1433.41009) Full Text: DOI arXiv OpenURL
Rack, Heinz-Joachim The second Zolotarev case in the Erdős-Szegö solution to a Markov-type extremal problem of Schur. (English) Zbl 1413.26030 J. Numer. Anal. Approx. Theory 46, No. 1, 54-77 (2017). MSC: 26C05 26D10 41A10 41A17 41A29 41A44 41A50 PDF BibTeX XML Cite \textit{H.-J. Rack}, J. Numer. Anal. Approx. Theory 46, No. 1, 54--77 (2017; Zbl 1413.26030) OpenURL
Wu, Xiaomei Best constants for a class of Hausdorff operators on Lebesgue spaces. (Chinese. English summary) Zbl 1399.42063 Adv. Math., Beijing 46, No. 5, 793-800 (2017). MSC: 42B25 42B35 41A44 PDF BibTeX XML Cite \textit{X. Wu}, Adv. Math., Beijing 46, No. 5, 793--800 (2017; Zbl 1399.42063) Full Text: DOI OpenURL
Takemura, Kazuo; Kametaka, Yoshinori; Nagai, Atsushi A hierarchical structure for the sharp constants of discrete Sobolev inequalities on a weighted complete graph. (English) Zbl 1390.46040 Symmetry 10, No. 1, Article ID 1, 13 p. (2018). MSC: 46E39 41A44 05C50 PDF BibTeX XML Cite \textit{K. Takemura} et al., Symmetry 10, No. 1, Article ID 1, 13 p. (2017; Zbl 1390.46040) Full Text: DOI OpenURL
Gladkaya, A. V.; Vinogradov, L. Sharp Jackson type inequalities for spline approximation on the axis. (English) Zbl 1399.41012 Anal. Math. 43, No. 1, 27-47 (2017). MSC: 41A15 41A17 41A44 PDF BibTeX XML Cite \textit{A. V. Gladkaya} and \textit{L. Vinogradov}, Anal. Math. 43, No. 1, 27--47 (2017; Zbl 1399.41012) Full Text: DOI OpenURL
Araújo, Gustavo Da Silva; Jiménez-Rodríguez, Pablo; Muñoz-Fernández, Gustavo A.; Seoane-Sepúlveda, Juan B. Polynomial inequalities on the \(\pi/4\)-circle sector. (English) Zbl 1395.46033 J. Convex Anal. 24, No. 3, 927-953 (2017). Reviewer: Jamilson Ramos Campos (João Pessoa) MSC: 46G25 46B28 41A44 26D05 PDF BibTeX XML Cite \textit{G. Da S. Araújo} et al., J. Convex Anal. 24, No. 3, 927--953 (2017; Zbl 1395.46033) Full Text: arXiv Link OpenURL
Păltănea, Radu; Talpău Dimitriu, Maria Estimates for weighted \(K\)-functionals using the least concave majorant of weighted moduli of continuity. (English) Zbl 1381.41011 Numer. Funct. Anal. Optim. 38, No. 12, 1589-1600 (2017). MSC: 41A17 26A15 41A44 PDF BibTeX XML Cite \textit{R. Păltănea} and \textit{M. Talpău Dimitriu}, Numer. Funct. Anal. Optim. 38, No. 12, 1589--1600 (2017; Zbl 1381.41011) Full Text: DOI OpenURL
Langenau, Holger Asymptotically sharp inequalities for polynomials involving mixed Gegenbauer norms. (English) Zbl 1376.41027 Asymptotic Anal. 103, No. 4, 221-233 (2017). MSC: 41A44 41A17 15A60 PDF BibTeX XML Cite \textit{H. Langenau}, Asymptotic Anal. 103, No. 4, 221--233 (2017; Zbl 1376.41027) Full Text: DOI OpenURL
Reich, Simeon; Zalas, Rafał The optimal error bound for the method of simultaneous projections. (English) Zbl 1381.41013 J. Approx. Theory 223, 96-107 (2017). Reviewer: Aurelian Bejancu (Safat) MSC: 41A25 41A28 41A44 41A65 PDF BibTeX XML Cite \textit{S. Reich} and \textit{R. Zalas}, J. Approx. Theory 223, 96--107 (2017; Zbl 1381.41013) Full Text: DOI arXiv OpenURL
Vakarchuk, Sergei Borisovich Exact constants in Jackson-type inequalities for the best mean square approximation in \(L_2(\mathbb{R})\) and exact values of mean \(\nu\)-widths of the classes of functions. (English. Ukrainian original) Zbl 1371.41037 J. Math. Sci., New York 224, No. 4, 582-603 (2017); translation from Ukr. Mat. Visn. 13, No. 4, 543-569 (2016). MSC: 41A44 41A17 30D20 41A46 PDF BibTeX XML Cite \textit{S. B. Vakarchuk}, J. Math. Sci., New York 224, No. 4, 582--603 (2017; Zbl 1371.41037); translation from Ukr. Mat. Visn. 13, No. 4, 543--569 (2016) Full Text: DOI OpenURL
Kovalenko, Oleg V. Ostrowski type inequalities for sets and functions of bounded variation. (English) Zbl 1365.26019 J. Inequal. Appl. 2017, Paper No. 151, 16 p. (2017). MSC: 26D15 41A17 41A44 41A63 PDF BibTeX XML Cite \textit{O. V. Kovalenko}, J. Inequal. Appl. 2017, Paper No. 151, 16 p. (2017; Zbl 1365.26019) Full Text: DOI OpenURL
Alzer, Horst; Jameson, Graham A harmonic mean inequality for the digamma function and related results. (English) Zbl 1366.33003 Rend. Semin. Mat. Univ. Padova 137, 203-209 (2017). MSC: 33B15 39B62 41A44 PDF BibTeX XML Cite \textit{H. Alzer} and \textit{G. Jameson}, Rend. Semin. Mat. Univ. Padova 137, 203--209 (2017; Zbl 1366.33003) Full Text: DOI OpenURL
Böttcher, Albrecht; Rebs, Christian On the constants in Markov inequalities for the Laplace operator on polynomials with the Laguerre norm. (English) Zbl 1365.41013 Asymptotic Anal. 101, No. 4, 227-239 (2017). MSC: 41A44 26D15 PDF BibTeX XML Cite \textit{A. Böttcher} and \textit{C. Rebs}, Asymptotic Anal. 101, No. 4, 227--239 (2017; Zbl 1365.41013) Full Text: DOI OpenURL
Acu, Ana-Maria; Gonska, Heiner Generalized alomari functionals. (English) Zbl 1364.41018 Mediterr. J. Math. 14, No. 1, Paper No. 1, 17 p. (2017). MSC: 41A55 41A44 65D30 PDF BibTeX XML Cite \textit{A.-M. Acu} and \textit{H. Gonska}, Mediterr. J. Math. 14, No. 1, Paper No. 1, 17 p. (2017; Zbl 1364.41018) Full Text: DOI arXiv OpenURL
Floater, Michael S.; Sande, Espen Optimal spline spaces of higher degree for \(L^2\) \(n\)-widths. (English) Zbl 1358.41007 J. Approx. Theory 216, 1-15 (2017). Reviewer: Martin D. Buhmann (Gießen) MSC: 41A15 41A44 47G10 PDF BibTeX XML Cite \textit{M. S. Floater} and \textit{E. Sande}, J. Approx. Theory 216, 1--15 (2017; Zbl 1358.41007) Full Text: DOI OpenURL
Ounaïes, Myriam A sharp bound on the Lebesgue constant for Leja points in the unit disk. (English) Zbl 1357.41005 J. Approx. Theory 213, 70-77 (2017). Reviewer: Costică Mustăţa (Cluj-Napoca) MSC: 41A10 41A05 41A17 41A44 PDF BibTeX XML Cite \textit{M. Ounaïes}, J. Approx. Theory 213, 70--77 (2017; Zbl 1357.41005) Full Text: DOI arXiv OpenURL
Sîntămărian, Alina Estimating a special difference of harmonic numbers. (English) Zbl 1389.11151 Creat. Math. Inform. 25, No. 1, 99-106 (2016). MSC: 11Y60 40A05 41A44 33B15 PDF BibTeX XML Cite \textit{A. Sîntămărian}, Creat. Math. Inform. 25, No. 1, 99--106 (2016; Zbl 1389.11151) OpenURL
Böttcher, Albrecht; Langenau, Holger; Widom, Harold Schatten class integral operators occurring in Markov-type inequalities. (English) Zbl 1377.47009 Eisner, Tanja (ed.) et al., Operator theory, function spaces, and applications. International workshop on operator theory and applications, Amsterdam, The Netherlands, July 14–18, 2014. Basel: Birkhäuser/Springer (ISBN 978-3-319-31381-8/hbk; 978-3-319-31383-2/ebook). Operator Theory: Advances and Applications 255, 91-104 (2016). MSC: 47B10 26D10 41A44 45D05 PDF BibTeX XML Cite \textit{A. Böttcher} et al., Oper. Theory: Adv. Appl. 255, 91--104 (2016; Zbl 1377.47009) Full Text: DOI OpenURL
Liu, Yongping; Wu, Wenyan; Xu, Guiqiao The best constants in the Wirtinger inequality. (English) Zbl 1354.41025 Int. J. Wavelets Multiresolut. Inf. Process. 14, No. 6, Article ID 1650048, 13 p. (2016). MSC: 41A44 41A80 PDF BibTeX XML Cite \textit{Y. Liu} et al., Int. J. Wavelets Multiresolut. Inf. Process. 14, No. 6, Article ID 1650048, 13 p. (2016; Zbl 1354.41025) Full Text: DOI OpenURL
De Carli, Laura; Samad, Gohin Shaikh One-parameter groups of operators and discrete Hilbert transforms. (English) Zbl 1350.42010 Can. Math. Bull. 59, No. 3, 497-507 (2016). MSC: 42A99 47D03 42A45 42A50 41A44 PDF BibTeX XML Cite \textit{L. De Carli} and \textit{G. S. Samad}, Can. Math. Bull. 59, No. 3, 497--507 (2016; Zbl 1350.42010) Full Text: DOI arXiv OpenURL
Osȩkowski, Adam A sharp weak-type \((\infty,\infty)\) inequality for the Hilbert transform. (English) Zbl 1354.42010 Complex Anal. Oper. Theory 10, No. 6, 1133-1143 (2016). Reviewer: Yaogan Mensah (Lomé) MSC: 42A50 31B05 44A15 26D07 41A44 PDF BibTeX XML Cite \textit{A. Osȩkowski}, Complex Anal. Oper. Theory 10, No. 6, 1133--1143 (2016; Zbl 1354.42010) Full Text: DOI OpenURL
Labropoulos, Nikos; Rădulescu, Vicenţiu D. On the best constants in Sobolev inequalities on the solid torus in the limit case \(p = 1\). (English) Zbl 1359.46033 Adv. Nonlinear Anal. 5, No. 3, 261-291 (2016). MSC: 46E35 41A44 35B33 PDF BibTeX XML Cite \textit{N. Labropoulos} and \textit{V. D. Rădulescu}, Adv. Nonlinear Anal. 5, No. 3, 261--291 (2016; Zbl 1359.46033) Full Text: DOI OpenURL
Takemura, Kazuo; Nagai, Atsushi; Kametaka, Yoshinori Two types of discrete Sobolev inequalities on a weighted Toeplitz graph. (English) Zbl 1343.05097 Linear Algebra Appl. 507, 344-355 (2016). MSC: 05C50 41A44 46E39 PDF BibTeX XML Cite \textit{K. Takemura} et al., Linear Algebra Appl. 507, 344--355 (2016; Zbl 1343.05097) Full Text: DOI OpenURL
Popa, Dorian; Raşa, Ioan Best constant in stability of some positive linear operators. (English) Zbl 1353.39028 Aequationes Math. 90, No. 4, 719-726 (2016). Reviewer: Jens Schwaiger (Graz) MSC: 39B82 41A35 41A44 PDF BibTeX XML Cite \textit{D. Popa} and \textit{I. Raşa}, Aequationes Math. 90, No. 4, 719--726 (2016; Zbl 1353.39028) Full Text: DOI OpenURL