Marciniak, Karol; Saleem, Faisal; Wiora, Józef Influence of models approximating the fractional-order differential equations on the calculation accuracy. (English) Zbl 07810013 Commun. Nonlinear Sci. Numer. Simul. 131, Article ID 107807, 18 p. (2024). MSC: 41-XX 65-XX 34A08 PDFBibTeX XMLCite \textit{K. Marciniak} et al., Commun. Nonlinear Sci. Numer. Simul. 131, Article ID 107807, 18 p. (2024; Zbl 07810013) Full Text: DOI
Camarinha, Margarida; Silva Leite, Fátima; Crouch, Peter E. High-order splines on Riemannian manifolds. (English. Russian original) Zbl 07738529 Proc. Steklov Inst. Math. 321, 158-178 (2023); translation from Tr. Mat. Inst. Steklova 321, 172-193 (2023). Reviewer: Manfred Tasche (Rostock) MSC: 41A15 49J15 PDFBibTeX XMLCite \textit{M. Camarinha} et al., Proc. Steklov Inst. Math. 321, 158--178 (2023; Zbl 07738529); translation from Tr. Mat. Inst. Steklova 321, 172--193 (2023) Full Text: DOI
Chernov, Andreĭ Vladimirovich On flexibility of constraints system under approximation of optimal control problems. (Russian. English summary) Zbl 07602974 Izv. Inst. Mat. Inform., Udmurt. Gos. Univ. 59, 114-130 (2022). MSC: 49M25 41A30 49N90 PDFBibTeX XMLCite \textit{A. V. Chernov}, Izv. Inst. Mat. Inform., Udmurt. Gos. Univ. 59, 114--130 (2022; Zbl 07602974) Full Text: DOI MNR
Gao, Zixuan; Liang, Jiuyang; Xu, Zhenli A kernel-independent sum-of-exponentials method. (English) Zbl 1520.65011 J. Sci. Comput. 93, No. 2, Paper No. 40, 35 p. (2022). MSC: 65D15 41A30 42A38 65R20 PDFBibTeX XMLCite \textit{Z. Gao} et al., J. Sci. Comput. 93, No. 2, Paper No. 40, 35 p. (2022; Zbl 1520.65011) Full Text: DOI arXiv
Aboud, Anna; Weber, Eric S. The Kaczmarz algorithm in Banach spaces. (English) Zbl 1520.65037 Complex Anal. Oper. Theory 16, No. 5, Paper No. 63, 32 p. (2022). MSC: 65J99 41A65 65D15 42C15 65F99 PDFBibTeX XMLCite \textit{A. Aboud} and \textit{E. S. Weber}, Complex Anal. Oper. Theory 16, No. 5, Paper No. 63, 32 p. (2022; Zbl 1520.65037) Full Text: DOI
Jiang, Shidong; Greengard, Leslie Approximating the Gaussian as a sum of exponentials and its applications to the fast Gauss transform. (English) Zbl 1486.30107 Commun. Comput. Phys. 31, No. 1, 1-26 (2022). MSC: 30E10 41A20 65E05 65Y20 PDFBibTeX XMLCite \textit{S. Jiang} and \textit{L. Greengard}, Commun. Comput. Phys. 31, No. 1, 1--26 (2022; Zbl 1486.30107) Full Text: DOI
Izadbakhsh, Alireza; Kheirkhahan, Payam A note on the “Task-space control of robots using an adaptive Taylor series uncertainty estimator”. (English) Zbl 1480.93290 Int. J. Control 94, No. 3, 722-723 (2021). MSC: 93C85 93C40 41A58 PDFBibTeX XMLCite \textit{A. Izadbakhsh} and \textit{P. Kheirkhahan}, Int. J. Control 94, No. 3, 722--723 (2021; Zbl 1480.93290) Full Text: DOI
Vasu, G.; Siva Kumar, M.; Raju, M. Ramalinga Internal model control design based on approximation of linear discrete dynamical systems. (English) Zbl 1481.93079 Appl. Math. Modelling 97, 683-700 (2021). MSC: 93C80 41A21 PDFBibTeX XMLCite \textit{G. Vasu} et al., Appl. Math. Modelling 97, 683--700 (2021; Zbl 1481.93079) Full Text: DOI
Gombani, A.; Michaletzky, Gy. A general approach to multivariable recursive interpolation. (English) Zbl 1464.93033 Math. Control Signals Syst. 33, No. 1, 1-48 (2021). MSC: 93C35 93B05 41A05 PDFBibTeX XMLCite \textit{A. Gombani} and \textit{Gy. Michaletzky}, Math. Control Signals Syst. 33, No. 1, 1--48 (2021; Zbl 1464.93033) Full Text: DOI
Izadi, Mohammad Comparison of various fractional basis functions for solving fractional-order logistic population model. (English) Zbl 1499.92066 Facta Univ., Ser. Math. Inf. 35, No. 4, 1181-1198 (2020). MSC: 92D25 26A33 41A10 42C05 65L60 PDFBibTeX XMLCite \textit{M. Izadi}, Facta Univ., Ser. Math. Inf. 35, No. 4, 1181--1198 (2020; Zbl 1499.92066) Full Text: DOI
Haqshenas M., Amirreza; Fateh, Mohammad Mehdi; Ahmadi, Seyed Mohammad Adaptive control of electrically-driven nonholonomic wheeled mobile robots: Taylor series-based approach with guaranteed asymptotic stability. (English) Zbl 1467.93174 Int. J. Adapt. Control Signal Process. 34, No. 5, 638-661 (2020). MSC: 93C40 93C85 93D20 70F25 41A58 PDFBibTeX XMLCite \textit{A. Haqshenas M.} et al., Int. J. Adapt. Control Signal Process. 34, No. 5, 638--661 (2020; Zbl 1467.93174) Full Text: DOI
Guimarães, O.; Labecca, W.; Piqueira, José Roberto C. Generalized operational matrices and error bounds for polynomial basis. (English) Zbl 1510.65034 Math. Comput. Simul. 172, 258-272 (2020). MSC: 65D15 41A10 PDFBibTeX XMLCite \textit{O. Guimarães} et al., Math. Comput. Simul. 172, 258--272 (2020; Zbl 1510.65034) Full Text: DOI
Karagoz, Ridvan; Batselier, Kim Nonlinear system identification with regularized tensor network B-splines. (English) Zbl 1453.93063 Automatica 122, Article ID 109300, 9 p. (2020). MSC: 93B30 93C10 41A15 PDFBibTeX XMLCite \textit{R. Karagoz} and \textit{K. Batselier}, Automatica 122, Article ID 109300, 9 p. (2020; Zbl 1453.93063) Full Text: DOI arXiv
Aboud, Anna; Curl, Emelie; Harding, Steven N.; Vaughan, Mary; Weber, Eric S. The dual Kaczmarz algorithm. (English) Zbl 1486.65057 Acta Appl. Math. 165, 133-148 (2020). Reviewer: Mehdi Rashidi-Kouchi (Kerman) MSC: 65J22 42C15 41A65 PDFBibTeX XMLCite \textit{A. Aboud} et al., Acta Appl. Math. 165, 133--148 (2020; Zbl 1486.65057) Full Text: DOI arXiv
Gong, Cheng; Zhu, Guopu; Shi, Yan Exponential stability analysis of time-delay systems based on Taylor expansion-based weighted integral inequality. (English) Zbl 1482.93512 Int. J. Syst. Sci., Princ. Appl. Syst. Integr. 50, No. 4, 807-816 (2019). MSC: 93D23 93C43 41A58 PDFBibTeX XMLCite \textit{C. Gong} et al., Int. J. Syst. Sci., Princ. Appl. Syst. Integr. 50, No. 4, 807--816 (2019; Zbl 1482.93512) Full Text: DOI
de Paula, N. C. G.; Marques, F. D. Multi-variable Volterra kernels identification using time-delay neural networks: application to unsteady aerodynamic loading. (English) Zbl 1430.41021 Nonlinear Dyn. 97, No. 1, 767-780 (2019). MSC: 41A58 37M10 PDFBibTeX XMLCite \textit{N. C. G. de Paula} and \textit{F. D. Marques}, Nonlinear Dyn. 97, No. 1, 767--780 (2019; Zbl 1430.41021) Full Text: DOI
Mohammadi, Fakhrodin; Hassani, Hossein Numerical solution of two-dimensional variable-order fractional optimal control problem by generalized polynomial basis. (English) Zbl 1409.49029 J. Optim. Theory Appl. 180, No. 2, 536-555 (2019). MSC: 49M30 35Q35 49J20 41A58 49J21 PDFBibTeX XMLCite \textit{F. Mohammadi} and \textit{H. Hassani}, J. Optim. Theory Appl. 180, No. 2, 536--555 (2019; Zbl 1409.49029) Full Text: DOI
Groza, Ghiocel; Razzaghi, Mohsen Approximation of solutions of polynomial partial differential equations in two independent variables. (English) Zbl 1403.35018 J. Comput. Appl. Math. 346, 205-223 (2019). MSC: 35A35 35G20 41A10 41A58 PDFBibTeX XMLCite \textit{G. Groza} and \textit{M. Razzaghi}, J. Comput. Appl. Math. 346, 205--223 (2019; Zbl 1403.35018) Full Text: DOI
Bataineh, Ahmad Sami Bernstein polynomials method and its error analysis for solving nonlinear problems in the calculus of variations: convergence analysis via residual function. (Bernstein polynomials method and it’s error analysis for solving nonlinear problems in the calculus of variations: convergence analysis via residual function.) (English) Zbl 1499.49082 Filomat 32, No. 4, 1379-1393 (2018). MSC: 49M25 49J10 49J21 11C08 11C20 15A99 65L05 41A17 41A35 PDFBibTeX XMLCite \textit{A. S. Bataineh}, Filomat 32, No. 4, 1379--1393 (2018; Zbl 1499.49082) Full Text: DOI
Carracedo Rodriguez, Andrea; Gugercin, Serkan; Borggaard, Jeff Interpolatory model reduction of parameterized bilinear dynamical systems. (English) Zbl 1406.93069 Adv. Comput. Math. 44, No. 6, 1887-1916 (2018). MSC: 93B11 93C10 93C05 41A05 93C15 PDFBibTeX XMLCite \textit{A. Carracedo Rodriguez} et al., Adv. Comput. Math. 44, No. 6, 1887--1916 (2018; Zbl 1406.93069) Full Text: DOI arXiv
Tomljanović, Zoran; Beattie, Christopher; Gugercin, Serkan Damping optimization of parameter dependent mechanical systems by rational interpolation. (English) Zbl 1416.90038 Adv. Comput. Math. 44, No. 6, 1797-1820 (2018). MSC: 90C26 74P10 70Q05 41A05 PDFBibTeX XMLCite \textit{Z. Tomljanović} et al., Adv. Comput. Math. 44, No. 6, 1797--1820 (2018; Zbl 1416.90038) Full Text: DOI arXiv
Binev, Peter; Cohen, Albert; Mula, Olga; Nichols, James Greedy algorithms for optimal measurements selection in state estimation using reduced models. (English) Zbl 1407.65256 SIAM/ASA J. Uncertain. Quantif. 6, 1101-1126 (2018). Reviewer: Murli Gupta (Washington, D. C.) MSC: 65N12 41A46 PDFBibTeX XMLCite \textit{P. Binev} et al., SIAM/ASA J. Uncertain. Quantif. 6, 1101--1126 (2018; Zbl 1407.65256) Full Text: DOI
Gosea, I. V.; Petreczky, M.; Antoulas, A. C. Data-driven model order reduction of linear switched systems in the Loewner framework. (English) Zbl 1390.35017 SIAM J. Sci. Comput. 40, No. 2, B572-B610 (2018). MSC: 35B30 41A20 41A63 93A15 93B15 93B30 93C35 93C80 PDFBibTeX XMLCite \textit{I. V. Gosea} et al., SIAM J. Sci. Comput. 40, No. 2, B572--B610 (2018; Zbl 1390.35017) Full Text: DOI arXiv
Jing, Shaoxue; Pan, Tianhong; Li, Zhengming Variable knot-based spline approximation recursive Bayesian algorithm for the identification of Wiener systems with process noise. (English) Zbl 1393.93031 Nonlinear Dyn. 90, No. 4, 2293-2303 (2017). MSC: 93B30 93E12 37N10 41A15 PDFBibTeX XMLCite \textit{S. Jing} et al., Nonlinear Dyn. 90, No. 4, 2293--2303 (2017; Zbl 1393.93031) Full Text: DOI
Biradar, Shivanagouda; Hote, Yogesh V.; Saxena, Sahaj Reduced-order modeling of linear time invariant systems using big bang big crunch optimization and time moment matching method. (English) Zbl 1471.93044 Appl. Math. Modelling 40, No. 15-16, 7225-7244 (2016). MSC: 93B11 41A20 90C59 90C90 PDFBibTeX XMLCite \textit{S. Biradar} et al., Appl. Math. Modelling 40, No. 15--16, 7225--7244 (2016; Zbl 1471.93044) Full Text: DOI
Singh, Jay; Vishwakarma, C. B.; Chattterjee, Kalyan Biased reduction method by combining improved modified pole clustering and improved Pade approximations. (English) Zbl 1446.93006 Appl. Math. Modelling 40, No. 2, 1418-1426 (2016). MSC: 93-10 93B11 41A21 PDFBibTeX XMLCite \textit{J. Singh} et al., Appl. Math. Modelling 40, No. 2, 1418--1426 (2016; Zbl 1446.93006) Full Text: DOI
Ghosh, Suchismita; Deb, Anish; Sarkar, Gautam Taylor series approach for function approximation using ‘estimated’ higher derivatives. (English) Zbl 1410.41044 Appl. Math. Comput. 284, 89-101 (2016). MSC: 41A58 41A46 65D15 PDFBibTeX XMLCite \textit{S. Ghosh} et al., Appl. Math. Comput. 284, 89--101 (2016; Zbl 1410.41044) Full Text: DOI
Tan, Shu-Jun; Peng, Hai-Jun; Zhou, Wen-Ya; Wu, Zhi-Gang A novel extended precise integration method based on Fourier series expansion for the \(\mathrm{H}_2\)-norm of linear time-varying periodic systems. (English) Zbl 1360.93242 Int. J. Control 89, No. 10, 2083-2095 (2016). MSC: 93B40 93C05 41A99 PDFBibTeX XMLCite \textit{S.-J. Tan} et al., Int. J. Control 89, No. 10, 2083--2095 (2016; Zbl 1360.93242) Full Text: DOI
Antoulas, A. C.; Gosea, I. V.; Ionita, A. C. Model reduction of bilinear systems in the Loewner framework. (English) Zbl 1515.35038 SIAM J. Sci. Comput. 38, No. 5, B889-B916 (2016). MSC: 35B30 41A20 41A63 93A15 93B15 93B30 93C35 93C80 PDFBibTeX XMLCite \textit{A. C. Antoulas} et al., SIAM J. Sci. Comput. 38, No. 5, B889--B916 (2016; Zbl 1515.35038) Full Text: DOI
Fei, Minggang; Mi, Wen; Pan, Yubin On model reduction with consecutively selected rational basis. (English) Zbl 1333.93064 Int. J. Wavelets Multiresolut. Inf. Process. 14, No. 1, Article ID 1650002, 13 p. (2016). MSC: 93B11 93B40 41A20 93C05 PDFBibTeX XMLCite \textit{M. Fei} et al., Int. J. Wavelets Multiresolut. Inf. Process. 14, No. 1, Article ID 1650002, 13 p. (2016; Zbl 1333.93064) Full Text: DOI
Baratchart, Laurent; Chevillard, Sylvain; Qian, Tao Minimax principle and lower bounds in \(H^2\)-rational approximation. (English) Zbl 1361.30057 J. Approx. Theory 206, 17-47 (2016). Reviewer: Vladimir V. Peller (East Lansing) MSC: 30E10 30H10 41A20 PDFBibTeX XMLCite \textit{L. Baratchart} et al., J. Approx. Theory 206, 17--47 (2016; Zbl 1361.30057) Full Text: DOI arXiv
Wang, Shouhong; Liu, Honghu; Ghil, Michael; Chekroun, Mickaël D. Low-dimensional Galerkin approximations of nonlinear delay differential equations. (English) Zbl 1336.34088 Discrete Contin. Dyn. Syst. 36, No. 8, 4133-4177 (2016). MSC: 34K07 34K17 34K28 41A10 34K23 PDFBibTeX XMLCite \textit{S. Wang} et al., Discrete Contin. Dyn. Syst. 36, No. 8, 4133--4177 (2016; Zbl 1336.34088) Full Text: DOI arXiv
Benner, Peter; Gugercin, Serkan; Willcox, Karen A survey of projection-based model reduction methods for parametric dynamical systems. (English) Zbl 1339.37089 SIAM Rev. 57, No. 4, 483-531 (2015). MSC: 37M99 35B30 41A05 65K99 93A15 93C05 PDFBibTeX XMLCite \textit{P. Benner} et al., SIAM Rev. 57, No. 4, 483--531 (2015; Zbl 1339.37089) Full Text: DOI Link
de la Sen, M.; Ibeas, A. On the global stability of an iterative scheme in a probabilistic Menger space. (English) Zbl 1391.41020 J. Inequal. Appl. 2015, Paper No. 243, 22 p. (2015). MSC: 41A65 54E70 54H25 PDFBibTeX XMLCite \textit{M. de la Sen} and \textit{A. Ibeas}, J. Inequal. Appl. 2015, Paper No. 243, 22 p. (2015; Zbl 1391.41020) Full Text: DOI
Stefanovski, Jovan A reformulation of augmented basic interpolation problem and an application to \(\mathcal{H}_\infty\) control. (English) Zbl 1323.30042 Linear Algebra Appl. 485, 103-123 (2015). MSC: 30E05 41A05 49N05 49N35 15A18 PDFBibTeX XMLCite \textit{J. Stefanovski}, Linear Algebra Appl. 485, 103--123 (2015; Zbl 1323.30042) Full Text: DOI
Stefanovski, Jovan \(\mathcal{H}_\infty\) problem with nonstrict inequality and all solutions: interpolation approach. (English) Zbl 1319.30023 SIAM J. Control Optim. 53, No. 4, 1734-1767 (2015). MSC: 30E05 41A05 15A22 15A18 PDFBibTeX XMLCite \textit{J. Stefanovski}, SIAM J. Control Optim. 53, No. 4, 1734--1767 (2015; Zbl 1319.30023) Full Text: DOI
Castillo-Toledo, Bernardino; Di Gennaro, Stefano; López-Cuevas, Armando Tracking through singularities using sliding mode differentiators. (English) Zbl 1340.93077 Kybernetika 51, No. 1, 20-35 (2015). MSC: 93C10 93B12 41A30 93B10 PDFBibTeX XMLCite \textit{B. Castillo-Toledo} et al., Kybernetika 51, No. 1, 20--35 (2015; Zbl 1340.93077) Full Text: DOI Link
De la Sen, M.; Ibeas, A.; Nistal, R. Approximate solutions by truncated Taylor series expansions of nonlinear differential equations and related shadowing property with applications. (English) Zbl 1474.34077 Abstr. Appl. Anal. 2014, Article ID 956318, 17 p. (2014). MSC: 34A45 41A58 PDFBibTeX XMLCite \textit{M. De la Sen} et al., Abstr. Appl. Anal. 2014, Article ID 956318, 17 p. (2014; Zbl 1474.34077) Full Text: DOI
Cui, Rongrong; Gu, Chuanqing Bivariate generalized inverse Newton-thiele type matrix Padé approximation. (English) Zbl 1334.41014 Appl. Math. Comput. 236, 202-214 (2014). MSC: 41A21 15A09 PDFBibTeX XMLCite \textit{R. Cui} and \textit{C. Gu}, Appl. Math. Comput. 236, 202--214 (2014; Zbl 1334.41014) Full Text: DOI
Cheng, C. M.; Dong, X. J.; Peng, Z. K.; Zhang, W. M.; Meng, G. Wavelet basis expansion-based spatio-temporal Volterra kernels identification for nonlinear distributed parameter systems. (English) Zbl 1331.42037 Nonlinear Dyn. 78, No. 2, 1179-1192 (2014). MSC: 42C40 41A15 93B30 37M05 PDFBibTeX XMLCite \textit{C. M. Cheng} et al., Nonlinear Dyn. 78, No. 2, 1179--1192 (2014; Zbl 1331.42037) Full Text: DOI
Zhou, Xiuxiang Approximations of infinite dimensional disturbance decoupling and almost disturbance decoupling problems. (English) Zbl 1303.93097 Math. Control Relat. Fields 4, No. 3, 381-399 (2014). MSC: 93C25 93C73 41A65 PDFBibTeX XMLCite \textit{X. Zhou}, Math. Control Relat. Fields 4, No. 3, 381--399 (2014; Zbl 1303.93097) Full Text: DOI
Zhai, Shuying; Feng, Xinlong; Weng, Zhifeng New high-order compact ADI algorithms for 3D nonlinear time-fractional convection-diffusion equation. (English) Zbl 1296.65118 Math. Probl. Eng. 2013, Article ID 246025, 11 p. (2013). MSC: 65M06 35R11 35K57 65R20 41A21 45K05 PDFBibTeX XMLCite \textit{S. Zhai} et al., Math. Probl. Eng. 2013, Article ID 246025, 11 p. (2013; Zbl 1296.65118) Full Text: DOI
Hong, Xia; Mitchell, R. J.; Chen, Sheng System identification of Wiener systems with B-spline functions using De Boor recursion. (English) Zbl 1280.93088 Int. J. Syst. Sci. 44, No. 9, 1666-1674 (2013). MSC: 93E12 93E11 41A15 PDFBibTeX XMLCite \textit{X. Hong} et al., Int. J. Syst. Sci. 44, No. 9, 1666--1674 (2013; Zbl 1280.93088) Full Text: DOI
Feichtinger, Hans G.; Pap, Margit Hyperbolic wavelets and multiresolution in the Hardy space of the upper half plane. (English) Zbl 1277.30043 Mashreghi, Javad (ed.) et al., Blaschke products and their applications. Proceedings based on the presentations at the conference, Toronto, Canada, July 25–29, 2011. New York, NY: Springer; Toronto: Fields Institute for Research in Mathematical Sciences (ISBN 978-1-4614-5340-6/hbk; 978-1-4614-5341-3/ebook). Fields Institute Communications 65, 193-208 (2013). MSC: 30H10 33C47 41A20 42C40 43A32 43A65 PDFBibTeX XMLCite \textit{H. G. Feichtinger} and \textit{M. Pap}, Fields Inst. Commun. 65, 193--208 (2013; Zbl 1277.30043) Full Text: DOI
Wu, Yue; Wang, Hui; Zhang, Biaobiao; Du, Ke-Lin Using radial basis function networks for function approximation and classification. (English) Zbl 1264.68137 ISRN Appl. Math. 2012, Article ID 324194, 34 p. (2012). MSC: 68T05 41A30 94A12 PDFBibTeX XMLCite \textit{Y. Wu} et al., ISRN Appl. Math. 2012, Article ID 324194, 34 p. (2012; Zbl 1264.68137) Full Text: DOI
Li, Junhong; Ding, Ruifeng; Yang, Yi Iterative parameter identification methods for nonlinear functions. (English) Zbl 1246.93114 Appl. Math. Modelling 36, No. 6, 2739-2750 (2012). MSC: 93E11 65K05 93B30 41A05 65H05 65J22 90C90 PDFBibTeX XMLCite \textit{J. Li} et al., Appl. Math. Modelling 36, No. 6, 2739--2750 (2012; Zbl 1246.93114) Full Text: DOI
Gomilko, Oleksandr; Karp, Dmitry B.; Lin, Minghua; Ziȩtak, Krystyna Regions of convergence of a Padé family of iterations for the matrix sector function and the matrix \(p\)th root. (English) Zbl 1251.65057 J. Comput. Appl. Math. 236, No. 17, 4410-4420 (2012). Reviewer: Constantin Popa (Constanţa) MSC: 65F30 33F05 15A24 65F10 41A21 15A16 PDFBibTeX XMLCite \textit{O. Gomilko} et al., J. Comput. Appl. Math. 236, No. 17, 4410--4420 (2012; Zbl 1251.65057) Full Text: DOI
Baratchart, Laurent; Stahl, Herbert; Yattselev, Maxim Weighted extremal domains and best rational approximation. (English) Zbl 1232.41014 Adv. Math. 229, No. 1, 357-407 (2012). MSC: 41A20 31A15 PDFBibTeX XMLCite \textit{L. Baratchart} et al., Adv. Math. 229, No. 1, 357--407 (2012; Zbl 1232.41014) Full Text: DOI arXiv
Riachy, Samer; Mboup, Mamadou; Richard, Jean-Pierre Multivariate numerical differentiation. (English) Zbl 1252.65060 J. Comput. Appl. Math. 236, No. 6, 1069-1089 (2011). MSC: 65D25 41A63 41A10 94A12 PDFBibTeX XMLCite \textit{S. Riachy} et al., J. Comput. Appl. Math. 236, No. 6, 1069--1089 (2011; Zbl 1252.65060) Full Text: DOI
Pap, Margit Hyperbolic wavelets and multiresolution in \(H^{2}(\mathbb{T})\). (English) Zbl 1228.42042 J. Fourier Anal. Appl. 17, No. 5, 755-776 (2011). MSC: 42C40 43A32 33C47 43A65 41A20 PDFBibTeX XMLCite \textit{M. Pap}, J. Fourier Anal. Appl. 17, No. 5, 755--776 (2011; Zbl 1228.42042) Full Text: DOI
Butzer, P. L.; Ferreira, P. J. S. G.; Higgins, J. R.; Saitoh, S.; Schmeisser, G.; Stens, R. L. Interpolation and sampling: E. T. Whittaker, K. Ogura and their followers. (English) Zbl 1213.94027 J. Fourier Anal. Appl. 17, No. 2, 320-354 (2011). Reviewer: R. W. van der Waall (Huizen) MSC: 94A20 41A05 01-02 94-03 01A27 PDFBibTeX XMLCite \textit{P. L. Butzer} et al., J. Fourier Anal. Appl. 17, No. 2, 320--354 (2011; Zbl 1213.94027) Full Text: DOI
Singler, John R. Optimality of balanced proper orthogonal decomposition for data reconstruction. (English) Zbl 1208.41011 Numer. Funct. Anal. Optim. 31, No. 7, 852-869 (2010). Reviewer: Manuel Calvo (Zaragoza) MSC: 41A28 41A45 47B10 37M05 PDFBibTeX XMLCite \textit{J. R. Singler}, Numer. Funct. Anal. Optim. 31, No. 7, 852--869 (2010; Zbl 1208.41011) Full Text: DOI
Fuhrmann, Paul A.; Helmke, Uwe On the use of functional models in model reduction. (English) Zbl 1198.15012 Willems, Jan C. (ed.) et al., Perspectives in mathematical system theory, control, and signal processing. A Festschrift in honor of Yutaka Yamamoto on the occasion of his 60th birthday. Invited papers of the symposium, Kyoto, Japan, March 29–31, 2010. Berlin: Springer (ISBN 978-3-540-93917-7/pbk; 978-3-540-93918-4/ebook). Lecture Notes in Control and Information Sciences 398, 177-187 (2010). MSC: 15A24 15A69 41A05 93B52 PDFBibTeX XMLCite \textit{P. A. Fuhrmann} and \textit{U. Helmke}, Lect. Notes Control Inf. Sci. 398, 177--187 (2010; Zbl 1198.15012) Full Text: DOI
Baratchart, Laurent; Yattselev, Maxim Convergent interpolation to Cauchy integrals over analytic arcs. (English) Zbl 1182.42026 Found. Comput. Math. 9, No. 6, 675-715 (2009). MSC: 42C05 41A20 41A21 PDFBibTeX XMLCite \textit{L. Baratchart} and \textit{M. Yattselev}, Found. Comput. Math. 9, No. 6, 675--715 (2009; Zbl 1182.42026) Full Text: DOI arXiv
Yi, Yang; Cao, Song Yin; Li, Tao; Guo, Lei Constrained discrete-time PI controller design for output PDFs of stochastic systems with time delays. (English) Zbl 1173.93373 Int. J. Syst. Sci. 40, No. 5, 439-448 (2009). MSC: 93E03 41A25 93C55 PDFBibTeX XMLCite \textit{Y. Yi} et al., Int. J. Syst. Sci. 40, No. 5, 439--448 (2009; Zbl 1173.93373) Full Text: DOI
Carbonell, F.; Jímenez, J. C.; Pedroso, L. M. Computing multiple integrals involving matrix exponentials. (English) Zbl 1133.65012 J. Comput. Appl. Math. 213, No. 1, 300-305 (2008). Reviewer: Manfred Tasche (Rostock) MSC: 65D32 65F30 41A55 41A63 PDFBibTeX XMLCite \textit{F. Carbonell} et al., J. Comput. Appl. Math. 213, No. 1, 300--305 (2008; Zbl 1133.65012) Full Text: DOI
Fasino, Dario; Gemignani, Luca Structured eigenvalue problems for rational Gauss quadrature. (English) Zbl 1127.65016 Numer. Algorithms 45, No. 1-4, 195-204 (2007). MSC: 65D32 65F15 65F18 41A55 PDFBibTeX XMLCite \textit{D. Fasino} and \textit{L. Gemignani}, Numer. Algorithms 45, No. 1--4, 195--204 (2007; Zbl 1127.65016) Full Text: DOI
Szwarc, Ryszard Kaczmarz algorithm in Hilbert space and tight frames. (English) Zbl 1109.41022 Appl. Comput. Harmon. Anal. 22, No. 3, 382-385 (2007). MSC: 41A65 PDFBibTeX XMLCite \textit{R. Szwarc}, Appl. Comput. Harmon. Anal. 22, No. 3, 382--385 (2007; Zbl 1109.41022) Full Text: DOI arXiv
Benner, Peter Numerical linear algebra for model reduction in control and simulation. (English) Zbl 1157.93337 GAMM-Mitt. 29, No. 2, 275-296 (2006). MSC: 93B11 65F30 41A20 65F15 93-02 15A18 PDFBibTeX XMLCite \textit{P. Benner}, GAMM-Mitt. 29, No. 2, 275--296 (2006; Zbl 1157.93337) Full Text: DOI
Wu, Beibei; Gu, Chuanqing A matrix Padé-type-Routh model reduction method for multivariable linear systems. (English) Zbl 1156.41305 J. Shanghai Univ. 10, No. 5, 377-380 (2006). MSC: 41A20 PDFBibTeX XMLCite \textit{B. Wu} and \textit{C. Gu}, J. Shanghai Univ. 10, No. 5, 377--380 (2006; Zbl 1156.41305) Full Text: DOI
Torokhti, Anatoli; Howlett, Phil Best approximation of the identity mapping: The case of variable finite memory. (English) Zbl 1148.41026 J. Approx. Theory 143, No. 1, 111-123 (2006). MSC: 41A50 47A58 PDFBibTeX XMLCite \textit{A. Torokhti} and \textit{P. Howlett}, J. Approx. Theory 143, No. 1, 111--123 (2006; Zbl 1148.41026) Full Text: DOI
Cardoso, João R.; Silva Leite, F. Padé and Gregory error estimates for the logarithm of block triangular matrices. (English) Zbl 1094.65037 Appl. Numer. Math. 56, No. 2, 253-267 (2006). Reviewer: Petko Hr. Petkov (Sofia) MSC: 65F30 15A24 41A21 PDFBibTeX XMLCite \textit{J. R. Cardoso} and \textit{F. Silva Leite}, Appl. Numer. Math. 56, No. 2, 253--267 (2006; Zbl 1094.65037) Full Text: DOI Link
Gu, Chuanqing Matrix Padé-type approximant and directional matrix Padé approximant in the inner product space. (English) Zbl 1050.41012 J. Comput. Appl. Math. 164-165, 365-385 (2004). Reviewer: Eleonora Storozhenko (Odessa) MSC: 41A21 41-06 PDFBibTeX XMLCite \textit{C. Gu}, J. Comput. Appl. Math. 164--165, 365--385 (2004; Zbl 1050.41012) Full Text: DOI
Mäkilä, P. M. Squared and absolute errors in optimal approximation of nonlinear systems. (English) Zbl 1043.93040 Automatica 39, No. 11, 1865-1876 (2003). Reviewer: Adhemar Bultheel (Leuven) MSC: 93C55 30B30 93C10 41A10 41A52 PDFBibTeX XMLCite \textit{P. M. Mäkilä}, Automatica 39, No. 11, 1865--1876 (2003; Zbl 1043.93040) Full Text: DOI
Sorensen, D. C.; Antoulas, A. C. The Sylvester equation and approximate balanced reduction. (English) Zbl 1023.93012 Linear Algebra Appl. 351-352, 671-700 (2002). Reviewer: L.Rodman (Williamsburg) MSC: 93B11 15A24 93B20 41A05 PDFBibTeX XMLCite \textit{D. C. Sorensen} and \textit{A. C. Antoulas}, Linear Algebra Appl. 351--352, 671--700 (2002; Zbl 1023.93012) Full Text: DOI
Cardoso, J. R.; Silva Leite, F. Theoretical and numerical considerations about Padé approximants for the matrix logarithm. (English) Zbl 0981.65053 Linear Algebra Appl. 330, No. 1-3, 31-42 (2001). Reviewer: Emil Minchev (Sofia) MSC: 65F30 15A54 41A21 PDFBibTeX XMLCite \textit{J. R. Cardoso} and \textit{F. Silva Leite}, Linear Algebra Appl. 330, No. 1--3, 31--42 (2001; Zbl 0981.65053) Full Text: DOI
Belforte, G.; Gay, P.; Monegato, G. Some new properties of Chebyshev polynomials. (English) Zbl 1064.41019 J. Comput. Appl. Math. 117, No. 2, 175-181 (2000), erratum 131, No. 1-2, 505 (2001). Reviewer: Aleksey A. Dovgoshey (Donetsk) MSC: 41A50 41A10 PDFBibTeX XMLCite \textit{G. Belforte} et al., J. Comput. Appl. Math. 117, No. 2, 175--181 (2001; Zbl 1064.41019) Full Text: DOI
Ribalta Stanford, Angel; López Lagomasino, Guillermo Approximation of transfer functions of infinite dimensional dynamical systems by rational interpolants with prescribed poles. (English) Zbl 0967.41008 J. Math. Anal. Appl. 244, No. 1, 147-168 (2000). Reviewer: Jacek Gilewicz (Marseille) MSC: 41A20 30E10 PDFBibTeX XMLCite \textit{A. Ribalta Stanford} and \textit{G. López Lagomasino}, J. Math. Anal. Appl. 244, No. 1, 147--168 (2000; Zbl 0967.41008) Full Text: DOI Link
Cuyt, Annie How well can the concept of Padé approximant be generalized to the multivariate case? (English) Zbl 0945.41012 J. Comput. Appl. Math. 105, No. 1-2, 25-50 (1999). Reviewer: N.Hayek (La Laguna) MSC: 41A21 41A63 PDFBibTeX XMLCite \textit{A. Cuyt}, J. Comput. Appl. Math. 105, No. 1--2, 25--50 (1999; Zbl 0945.41012) Full Text: DOI
Davis, G.; Mallat, S.; Avellaneda, M. Adaptive greedy approximations. (English) Zbl 0885.41006 Constructive Approximation 13, No. 1, 57-98 (1997). Reviewer: A.L.Lukashov (Saratov) MSC: 41A10 68Q15 37A99 65D99 60H30 PDFBibTeX XMLCite \textit{G. Davis} et al., Constr. Approx. 13, No. 1, 57--98 (1997; Zbl 0885.41006) Full Text: DOI
Hwang, Chyi; Hwang, Jyh-Haur A new two-step iterative method for optimal reduction of linear SISO systems. (English) Zbl 0881.93014 J. Franklin Inst. 333B, No. 5, 631-645 (1996). Reviewer: A.Bultheel (Leuven) MSC: 93B11 41A20 90C31 PDFBibTeX XMLCite \textit{C. Hwang} and \textit{J.-H. Hwang}, J. Franklin Inst. 333B, No. 5, 631--645 (1996; Zbl 0881.93014) Full Text: DOI
Aguirre, Luis Antonio Matrix formulae for open and closed-loop approximate model matching in frequency domain. (English) Zbl 0850.93139 Int. J. Syst. Sci. 26, No. 11, 2069-2089 (1995). MSC: 93B11 93A30 41A21 PDFBibTeX XMLCite \textit{L. A. Aguirre}, Int. J. Syst. Sci. 26, No. 11, 2069--2089 (1995; Zbl 0850.93139) Full Text: DOI
Hunt, L. R.; DeGroat, R. D.; Linebarger, D. A. Nonlinear AR modeling. (English) Zbl 0834.62079 Circuits Syst. Signal Process. 14, No. 5, 689-705 (1995). MSC: 62M10 41A58 41A99 PDFBibTeX XMLCite \textit{L. R. Hunt} et al., Circuits Syst. Signal Process. 14, No. 5, 689--705 (1995; Zbl 0834.62079) Full Text: DOI
Kavranoğlu, Davut; Bettayeb, Maamar Constant \(L_ \infty\) norm approximation of complex rational functions. (English) Zbl 0826.93011 Numer. Funct. Anal. Optimization 16, No. 1-2, 197-217 (1995). MSC: 93B11 41A44 93B15 93B20 PDFBibTeX XMLCite \textit{D. Kavranoğlu} and \textit{M. Bettayeb}, Numer. Funct. Anal. Optim. 16, No. 1--2, 197--217 (1995; Zbl 0826.93011) Full Text: DOI
Kavranoğlu, Davut \(H_ \infty\) norm approximation of discrete-time systems by constant matrices. (English) Zbl 0827.93022 Numer. Funct. Anal. Optimization 16, No. 1-2, 177-196 (1995). MSC: 93B36 41A44 93C55 93B20 PDFBibTeX XMLCite \textit{D. Kavranoğlu}, Numer. Funct. Anal. Optim. 16, No. 1--2, 177--196 (1995; Zbl 0827.93022) Full Text: DOI
Aguirre, Luis A.; Mendes, Eduardo M. A. M. The least-squares Padé method for model simplification of multivariable systems. (English) Zbl 0826.93010 Int. J. Syst. Sci. 26, No. 4, 819-839 (1995). MSC: 93B11 93C35 41A21 93C80 41A29 93B40 PDFBibTeX XMLCite \textit{L. A. Aguirre} and \textit{E. M. A. M. Mendes}, Int. J. Syst. Sci. 26, No. 4, 819--839 (1995; Zbl 0826.93010) Full Text: DOI
Dahleh, Munther A.; Sontag, Eduardo D.; Tse, David N. C.; Tsitsiklis, John N. Worst-case identification of nonlinear fading memory systems. (English) Zbl 0825.93115 Automatica 31, No. 3, 503-508 (1995). Reviewer: Z. Hasiewicz (Wrocław) MSC: 93B30 93C10 93C73 93B35 41A15 PDFBibTeX XMLCite \textit{M. A. Dahleh} et al., Automatica 31, No. 3, 503--508 (1995; Zbl 0825.93115) Full Text: DOI
Li, Xin Hankel operators and best Hankel approximation on the half-plane. (English) Zbl 0826.47018 Adv. Comput. Math. 2, No. 3, 343-355 (1994). MSC: 47B35 41A25 93B28 PDFBibTeX XMLCite \textit{X. Li}, Adv. Comput. Math. 2, No. 3, 343--355 (1994; Zbl 0826.47018) Full Text: DOI
Regalia, Phillip A.; Mboup, Mamadou Duality aspects between rational \({\mathcal H}_ 2\) and Hankel norm approximations. (English) Zbl 0810.41017 Helmke, Uwe (ed.) et al., Systems and networks: mathematical theory and applications. Proceedings of the 10th international symposium on the mathematical theory of networks and systems, MTNS ’93, held in Regensburg, Germany, August 2-6, 1993. Volume II: Invited and contributed papers. Berlin: Akademie Verlag. Math. Res. 839-842 (1994). Reviewer: L.Leindler (Szeged) MSC: 41A20 41A30 PDFBibTeX XMLCite \textit{P. A. Regalia} and \textit{M. Mboup}, in: Systems and networks: mathematical theory and applications. Proceedings of the 10th international symposium on the mathematical theory of networks and systems, MTNS '93, held in Regensburg, Germany, August 2-6, 1993. Volume II: Invited and contributed papers. Berlin: Akademie Verlag. 839--842 (1994; Zbl 0810.41017)
Park, Kiheon A class of interpolation algorithms for bounded real functions. (English) Zbl 0808.93023 Int. J. Control 60, No. 3, 331-346 (1994). MSC: 93B36 41A05 30E10 PDFBibTeX XMLCite \textit{K. Park}, Int. J. Control 60, No. 3, 331--346 (1994; Zbl 0808.93023) Full Text: DOI
Aguirre, Luis Antonio Model reduction via least-squares Padé simplification of squared- magnitude functions. (English) Zbl 0816.93016 Int. J. Syst. Sci. 25, No. 7, 1191-1204 (1994). MSC: 93B11 41A21 93A30 PDFBibTeX XMLCite \textit{L. A. Aguirre}, Int. J. Syst. Sci. 25, No. 7, 1191--1204 (1994; Zbl 0816.93016) Full Text: DOI
Lucas, T. N. Optimal model reduction by multipoint Padé approximation. (English) Zbl 0812.93020 J. Franklin Inst. 330, No. 1, 79-93 (1993). MSC: 93B11 41A21 93C05 93A30 93C80 PDFBibTeX XMLCite \textit{T. N. Lucas}, J. Franklin Inst. 330, No. 1, 79--93 (1993; Zbl 0812.93020) Full Text: DOI
Antsaklis, Panos J.; Gao, Zhiqiang Polynomial and rational matrix interpolation: Theory and control applications. (English) Zbl 0776.41001 Int. J. Control 58, No. 2, 349-404 (1993). MSC: 41A05 PDFBibTeX XMLCite \textit{P. J. Antsaklis} and \textit{Z. Gao}, Int. J. Control 58, No. 2, 349--404 (1993; Zbl 0776.41001) Full Text: DOI
Lucas, T. N. New matrix method for multipoint Padé approximation of transfer functions. (English) Zbl 0773.41021 Int. J. Syst. Sci. 24, No. 5, 809-818 (1993). MSC: 41A21 41A10 93C05 PDFBibTeX XMLCite \textit{T. N. Lucas}, Int. J. Syst. Sci. 24, No. 5, 809--818 (1993; Zbl 0773.41021) Full Text: DOI
Bai, Er-Wei; Chyung, Dong H. Improving delay estimates derived from least-square algorithms and Padé approximations. (English) Zbl 0775.93305 Int. J. Syst. Sci. 24, No. 4, 745-756 (1993). MSC: 93E24 41A21 PDFBibTeX XMLCite \textit{E.-W. Bai} and \textit{D. H. Chyung}, Int. J. Syst. Sci. 24, No. 4, 745--756 (1993; Zbl 0775.93305) Full Text: DOI
Lam, James Model reduction of delay systems using Padé approximants. (English) Zbl 0784.93015 Int. J. Control 57, No. 2, 377-391 (1993). MSC: 93B11 41A21 PDFBibTeX XMLCite \textit{J. Lam}, Int. J. Control 57, No. 2, 377--391 (1993; Zbl 0784.93015) Full Text: DOI
Rouff, Marc The computation of \(C^ k\) spline functions. (English) Zbl 0753.65009 Comput. Math. Appl. 23, No. 1, 103-110 (1992). MSC: 65D07 65K10 41A15 PDFBibTeX XMLCite \textit{M. Rouff}, Comput. Math. Appl. 23, No. 1, 103--110 (1992; Zbl 0753.65009) Full Text: DOI
Chui, Charles K.; Li, Xin; Ward, Joseph D. Rate of convergence of Schmidt pairs and rational functions corresponding to best approximants of truncated Hankel operators. (English) Zbl 0764.41010 Math. Control Signals Syst. 5, No. 1, 67-79 (1992). Reviewer: M.G.de Bruin (Haarlem) MSC: 41A20 41A50 PDFBibTeX XMLCite \textit{C. K. Chui} et al., Math. Control Signals Syst. 5, No. 1, 67--79 (1992; Zbl 0764.41010) Full Text: DOI
Van Barel, Marc; Bultheel, Adhemar A parallel algorithm for discrete least squares rational approximation. (English) Zbl 0762.41016 Numer. Math. 63, No. 1, 99-121 (1992). MSC: 41A20 65D15 65Y05 PDFBibTeX XMLCite \textit{M. Van Barel} and \textit{A. Bultheel}, Numer. Math. 63, No. 1, 99--121 (1992; Zbl 0762.41016) Full Text: DOI EuDML
Glover, K.; Lam, J.; Partington, J. R. Rational approximation of a class of infinite-dimensional systems. II: Optimnal convergence rates of \(L_{\infty}\) approximants. (English) Zbl 0733.41023 Math. Control Signals Syst. 4, No. 3, 233-346 (1991). Reviewer: V.Postolică (Piatra Neamt) MSC: 41A20 93B11 PDFBibTeX XMLCite \textit{K. Glover} et al., Math. Control Signals Syst. 4, No. 3, 233--346 (1991; Zbl 0733.41023) Full Text: DOI
Helton, J. W.; Spain, P. G.; Young, N. J. Tracking poles and representing Hankel operators directly from data. (English) Zbl 0726.30003 Numer. Math. 58, No. 6, 641-660 (1991). Reviewer: N.J.Young (Lancaster) MSC: 30-04 30E10 41A20 65E05 93-04 PDFBibTeX XMLCite \textit{J. W. Helton} et al., Numer. Math. 58, No. 6, 641--660 (1991; Zbl 0726.30003) Full Text: DOI EuDML
Gera, Amos E. Bode’s integral revisited. (English) Zbl 0725.93037 Int. J. Syst. Sci. 22, No. 4, 667-674 (1991). MSC: 93B40 93B50 65D30 41A55 PDFBibTeX XMLCite \textit{A. E. Gera}, Int. J. Syst. Sci. 22, No. 4, 667--674 (1991; Zbl 0725.93037) Full Text: DOI
Chui, Charles K.; Li, Xin; Ward, Joseph D. System reduction via truncated Hankel matrices. (English) Zbl 0724.93012 Math. Control Signals Syst. 4, No. 2, 161-175 (1991). MSC: 93B11 47B35 41A20 PDFBibTeX XMLCite \textit{C. K. Chui} et al., Math. Control Signals Syst. 4, No. 2, 161--175 (1991; Zbl 0724.93012) Full Text: DOI
Glover, K.; Lam, J.; Partington, J. R. Rational approximation of a class of infinite-dimensional systems. I: Singular values of Hankel operators. (English) Zbl 0727.41020 Math. Control Signals Syst. 3, No. 4, 325-344 (1990). Reviewer: D.Wulbert (La Jolla) MSC: 41A20 PDFBibTeX XMLCite \textit{K. Glover} et al., Math. Control Signals Syst. 3, No. 4, 325--344 (1990; Zbl 0727.41020) Full Text: DOI
Antoulas, A. C.; Ball, J. A.; Kang, J.; Willems, J. C. On the solution of the minimal rational interpolation problem. (English) Zbl 0715.93020 Linear Algebra Appl. 137-138, 511-573 (1990). MSC: 93B25 41A20 41A05 93B15 PDFBibTeX XMLCite \textit{A. C. Antoulas} et al., Linear Algebra Appl. 137--138, 511--573 (1990; Zbl 0715.93020) Full Text: DOI
Mäkilä, P. M. Approximation and identification of continuous-time systems. (English) Zbl 0711.93029 Int. J. Control 52, No. 3, 669-687 (1990). MSC: 93B30 93B51 41A45 42C10 PDFBibTeX XMLCite \textit{P. M. Mäkilä}, Int. J. Control 52, No. 3, 669--687 (1990; Zbl 0711.93029) Full Text: DOI
Wang, Weiping New approach to analysis and optimal control of time-varying systems via Taylor series. (English) Zbl 0709.93047 Int. J. Syst. Sci. 21, No. 9, 1831-1839 (1990). MSC: 93C99 93B40 49N10 41A58 PDFBibTeX XMLCite \textit{W. Wang}, Int. J. Syst. Sci. 21, No. 9, 1831--1839 (1990; Zbl 0709.93047) Full Text: DOI
Mäkilä, Pertti M. Approximation of stable systems by Laguerre filters. (English) Zbl 0708.93007 Automatica 26, No. 2, 333-345 (1990). MSC: 93B11 93B28 41A30 47B35 PDFBibTeX XMLCite \textit{P. M. Mäkilä}, Automatica 26, No. 2, 333--345 (1990; Zbl 0708.93007) Full Text: DOI
Howitt, George D.; Luus, Rein Model reduction by minimization of integral square error performance indices. (English) Zbl 0706.93004 J. Franklin Inst. 327, No. 3, 343-357 (1990). Reviewer: R.Rempala MSC: 93A15 93B11 41A20 93B15 PDFBibTeX XMLCite \textit{G. D. Howitt} and \textit{R. Luus}, J. Franklin Inst. 327, No. 3, 343--357 (1990; Zbl 0706.93004) Full Text: DOI
Papadopoulos, D. P.; Boglou, A. K. Reduced-order modelling of linear MIMO systems with the Padé approximation method. (English) Zbl 0703.93022 Int. J. Syst. Sci. 21, No. 4, 693-710 (1990). MSC: 93B11 41A21 93C05 93C15 93C35 PDFBibTeX XMLCite \textit{D. P. Papadopoulos} and \textit{A. K. Boglou}, Int. J. Syst. Sci. 21, No. 4, 693--710 (1990; Zbl 0703.93022) Full Text: DOI