Zhang, Changgui Analytical study of the pantograph equation using Jacobi theta functions. (English) Zbl 07761706 J. Approx. Theory 296, Article ID 105974, 21 p. (2023). MSC: 41-XX 42-XX 34K06 34M40 33E30 PDFBibTeX XMLCite \textit{C. Zhang}, J. Approx. Theory 296, Article ID 105974, 21 p. (2023; Zbl 07761706) Full Text: DOI
Gibson, Peter C. Theorems of Szegö-Verblunsky type in the multivariate and almost periodic settings. (English) Zbl 1528.42034 J. Approx. Theory 290, Article ID 105884, 34 p. (2023). MSC: 42C05 32A10 34L25 34L40 42A75 42B30 PDFBibTeX XMLCite \textit{P. C. Gibson}, J. Approx. Theory 290, Article ID 105884, 34 p. (2023; Zbl 1528.42034) Full Text: DOI arXiv
Markett, Clemens The differential equation for Jacobi-Sobolev orthogonal polynomials with two linear perturbutions. (English) Zbl 1516.33008 J. Approx. Theory 280, Article ID 105782, 24 p. (2022). MSC: 33C47 34B30 34L10 PDFBibTeX XMLCite \textit{C. Markett}, J. Approx. Theory 280, Article ID 105782, 24 p. (2022; Zbl 1516.33008) Full Text: DOI
Skorokhodov, Dmytro The Landau-Kolmogorov problem on a finite interval in the Taikov case. (English) Zbl 1508.41004 J. Approx. Theory 280, Article ID 105771, 17 p. (2022). Reviewer: Yuri A. Farkov (Moskva) MSC: 41A17 26D10 34B24 41A35 PDFBibTeX XMLCite \textit{D. Skorokhodov}, J. Approx. Theory 280, Article ID 105771, 17 p. (2022; Zbl 1508.41004) Full Text: DOI arXiv
Nemes, Gergő On the Borel summability of WKB solutions of certain Schrödinger-type differential equations. (English) Zbl 1472.34158 J. Approx. Theory 265, Article ID 105562, 30 p. (2021). Reviewer: Shun Shimomura (Yokohama) MSC: 34M30 34M25 34M03 PDFBibTeX XMLCite \textit{G. Nemes}, J. Approx. Theory 265, Article ID 105562, 30 p. (2021; Zbl 1472.34158) Full Text: DOI arXiv
Magnus, Alphonse P.; Ndayiragije, François; Ronveaux, André About families of orthogonal polynomials satisfying Heun’s differential equation. (English) Zbl 1462.33004 J. Approx. Theory 263, Article ID 105522, 30 p. (2021). Reviewer: Thomas Ernst (Uppsala) MSC: 33C45 34M35 34M55 41A21 42C05 81Q05 PDFBibTeX XMLCite \textit{A. P. Magnus} et al., J. Approx. Theory 263, Article ID 105522, 30 p. (2021; Zbl 1462.33004) Full Text: DOI
Aptekarev, Alexander I.; Kozhan, Rostyslav Differential equations for the recurrence coefficients limits for multiple orthogonal polynomials from a Nevai class. (English) Zbl 1440.42115 J. Approx. Theory 255, Article ID 105409, 20 p. (2020). MSC: 42C05 33C45 34A05 PDFBibTeX XMLCite \textit{A. I. Aptekarev} and \textit{R. Kozhan}, J. Approx. Theory 255, Article ID 105409, 20 p. (2020; Zbl 1440.42115) Full Text: DOI arXiv
Remling, Christian; Scarbrough, Kyle The essential spectrum of canonical systems. (English) Zbl 1457.34122 J. Approx. Theory 254, Article ID 105395, 11 p. (2020). Reviewer: Hubert Kalf (München) MSC: 34L05 34C10 34L40 PDFBibTeX XMLCite \textit{C. Remling} and \textit{K. Scarbrough}, J. Approx. Theory 254, Article ID 105395, 11 p. (2020; Zbl 1457.34122) Full Text: DOI arXiv
Gómez-Ullate, David; Grandati, Yves; Milson, Robert Corrigendum on the proof of completeness for exceptional Hermite polynomials: “Rational extensions of the quantum harmonic oscillator and exceptional Hermite polynomials”. (English) Zbl 1441.81087 J. Approx. Theory 253, Article ID 105350, 10 p. (2020). MSC: 81Q05 81U15 33C20 32S40 34M35 81P15 PDFBibTeX XMLCite \textit{D. Gómez-Ullate} et al., J. Approx. Theory 253, Article ID 105350, 10 p. (2020; Zbl 1441.81087) Full Text: DOI
Sato, Shota; Takeuchi, Shingo Two double-angle formulas of generalized trigonometric functions. (English) Zbl 1431.33022 J. Approx. Theory 250, Article ID 105322, 5 p. (2020). Reviewer: Sergei V. Rogosin (Minsk) MSC: 33E05 34L40 PDFBibTeX XMLCite \textit{S. Sato} and \textit{S. Takeuchi}, J. Approx. Theory 250, Article ID 105322, 5 p. (2020; Zbl 1431.33022) Full Text: DOI arXiv
Markett, Clemens On the differential equation for the Laguerre-Sobolev polynomials. (English) Zbl 1429.33019 J. Approx. Theory 247, 48-67 (2019). Reviewer: Manuel D. de la Iglesia (México D. F.) MSC: 33C47 34B30 34L10 PDFBibTeX XMLCite \textit{C. Markett}, J. Approx. Theory 247, 48--67 (2019; Zbl 1429.33019) Full Text: DOI arXiv
Kutsenko, Anton A. A note on sharp spectral estimates for periodic Jacobi matrices. (English) Zbl 07050070 J. Approx. Theory 242, 58-63 (2019). MSC: 47A10 34L40 47E05 47N50 81Q10 PDFBibTeX XMLCite \textit{A. A. Kutsenko}, J. Approx. Theory 242, 58--63 (2019; Zbl 07050070) Full Text: DOI arXiv
Fleeman, Matthew; Frymark, Dale; Liaw, Constanze Boundary conditions associated with the general left-definite theory for differential operators. (English) Zbl 07015415 J. Approx. Theory 239, 1-28 (2019). MSC: 47E05 34L10 47B25 47B65 PDFBibTeX XMLCite \textit{M. Fleeman} et al., J. Approx. Theory 239, 1--28 (2019; Zbl 07015415) Full Text: DOI arXiv
Casper, W. Riley Elementary examples of solutions to Bochner’s problem for matrix differential operators. (English) Zbl 06859910 J. Approx. Theory 229, 36-71 (2018). MSC: 47G10 34B30 PDFBibTeX XMLCite \textit{W. R. Casper}, J. Approx. Theory 229, 36--71 (2018; Zbl 06859910) Full Text: DOI arXiv
Clarkson, Peter A.; Jordaan, Kerstin Properties of generalized Freud polynomials. (English) Zbl 1437.33011 J. Approx. Theory 225, 148-175 (2018). Reviewer: Chrysoula G. Kokologiannaki (Patras) MSC: 33C47 34M55 65Q30 PDFBibTeX XMLCite \textit{P. A. Clarkson} and \textit{K. Jordaan}, J. Approx. Theory 225, 148--175 (2018; Zbl 1437.33011) Full Text: DOI arXiv Link
Xu, Shuai-Xia; Dai, Dan; Zhao, Yu-Qiu Hankel determinants for a singular complex weight and the first and third Painlevé transcendents. (English) Zbl 1339.33022 J. Approx. Theory 205, 64-92 (2016). Reviewer: Tsvetana Stoyanova (Sofia) MSC: 33E17 34M55 41A60 PDFBibTeX XMLCite \textit{S.-X. Xu} et al., J. Approx. Theory 205, 64--92 (2016; Zbl 1339.33022) Full Text: DOI arXiv
Liaw, Constanze; Littlejohn, Lance L.; Milson, Robert; Stewart, Jessica The spectral analysis of three families of exceptional Laguerre polynomials. (English) Zbl 1333.33018 J. Approx. Theory 202, 5-41 (2016). Reviewer: Chrysoula G. Kokologiannaki (Patras) MSC: 33C45 34B24 42C05 33C47 47B25 PDFBibTeX XMLCite \textit{C. Liaw} et al., J. Approx. Theory 202, 5--41 (2016; Zbl 1333.33018) Full Text: DOI
Basor, Estelle L.; Chen, Yang; Haq, Nazmus S. Asymptotics of determinants of Hankel matrices via non-linear difference equations. (English) Zbl 1326.33020 J. Approx. Theory 198, 63-110 (2015). MSC: 33C47 15B52 34E05 42C05 47B35 34A05 PDFBibTeX XMLCite \textit{E. L. Basor} et al., J. Approx. Theory 198, 63--110 (2015; Zbl 1326.33020) Full Text: DOI arXiv
Durán, Antonio J.; de la Iglesia, Manuel D. Differential equations for discrete Laguerre-Sobolev orthogonal polynomials. (English) Zbl 1320.42018 J. Approx. Theory 195, 70-88 (2015). Reviewer: Marcel G. de Bruin (Haarlem) MSC: 42C05 33C45 34A05 PDFBibTeX XMLCite \textit{A. J. Durán} and \textit{M. D. de la Iglesia}, J. Approx. Theory 195, 70--88 (2015; Zbl 1320.42018) Full Text: DOI arXiv
Xu, Shuai-Xia; Dai, Dan; Zhao, Yu-Qiu Painlevé III asymptotics of Hankel determinants for a singularly perturbed Laguerre weight. (English) Zbl 1314.33021 J. Approx. Theory 192, 1-18 (2015). Reviewer: Andrei A. Kapaev (St. Petersburg) MSC: 33E17 34M55 41A60 34M30 PDFBibTeX XMLCite \textit{S.-X. Xu} et al., J. Approx. Theory 192, 1--18 (2015; Zbl 1314.33021) Full Text: DOI arXiv
Durán, Antonio J. Exceptional Meixner and Laguerre orthogonal polynomials. (English) Zbl 1295.33013 J. Approx. Theory 184, 176-208 (2014); corrigendum ibid. 253, Article ID 105349, 5 p. (2020). Reviewer: Francisco Marcellán (Leganes) MSC: 33C45 42C05 34A05 34B24 PDFBibTeX XMLCite \textit{A. J. Durán}, J. Approx. Theory 184, 176--208 (2014; Zbl 1295.33013) Full Text: DOI arXiv
Durán, Antonio J. Using \(\mathcal D\)-operators to construct orthogonal polynomials satisfying higher order difference or differential equations. (English) Zbl 1286.34114 J. Approx. Theory 174, 10-53 (2013). Reviewer: Andrei A. Kapaev (St. Petersburg) MSC: 34L10 42C05 PDFBibTeX XMLCite \textit{A. J. Durán}, J. Approx. Theory 174, 10--53 (2013; Zbl 1286.34114) Full Text: DOI arXiv
Segura, Javier On bounds for monotonic first order differential systems and the Liouville-Green approximation. (English) Zbl 1284.34015 J. Approx. Theory 170, 107-115 (2013). MSC: 34A30 33C10 33C20 33C45 34C11 PDFBibTeX XMLCite \textit{J. Segura}, J. Approx. Theory 170, 107--115 (2013; Zbl 1284.34015) Full Text: DOI
Neuschel, Thorsten Asymptotics for Ménage polynomials and certain hypergeometric polynomials of type \(_{3}F_{1}\). (English) Zbl 1250.33010 J. Approx. Theory 164, No. 7, 981-1006 (2012). Reviewer: Chrysoula G. Kokologiannaki (Patras) MSC: 33C20 33C10 34M30 PDFBibTeX XMLCite \textit{T. Neuschel}, J. Approx. Theory 164, No. 7, 981--1006 (2012; Zbl 1250.33010) Full Text: DOI
Djakov, Plamen; Mityagin, Boris Equiconvergence of spectral decompositions of 1D Dirac operators with regular boundary conditions. (English) Zbl 1258.34174 J. Approx. Theory 164, No. 7, 879-927 (2012). Reviewer: Chuan-Fu Yang (Nanjing) MSC: 34L40 34L10 41A30 47A75 PDFBibTeX XMLCite \textit{P. Djakov} and \textit{B. Mityagin}, J. Approx. Theory 164, No. 7, 879--927 (2012; Zbl 1258.34174) Full Text: DOI arXiv
Durán, Antonio J. A miraculously commuting family of orthogonal matrix polynomials satisfying second order differential equations. (English) Zbl 1234.15006 J. Approx. Theory 163, No. 12, 1815-1833 (2011). Reviewer: Grozio Stanilov (Sofia) MSC: 15A54 15A24 42C05 34A30 PDFBibTeX XMLCite \textit{A. J. Durán}, J. Approx. Theory 163, No. 12, 1815--1833 (2011; Zbl 1234.15006) Full Text: DOI
de la Iglesia, Manuel D. Some examples of matrix-valued orthogonal functions having a differential and an integral operator as eigenfunctions. (English) Zbl 1221.42048 J. Approx. Theory 163, No. 5, 663-687 (2011). Reviewer: Enji Sato (Yamagata) MSC: 42C05 34L10 34L30 PDFBibTeX XMLCite \textit{M. D. de la Iglesia}, J. Approx. Theory 163, No. 5, 663--687 (2011; Zbl 1221.42048) Full Text: DOI arXiv Link
Chen, Yang; Dai, Dan Painlevé V and a Pollaczek-Jacobi type orthogonal polynomials. (English) Zbl 1221.33015 J. Approx. Theory 162, No. 12, 2149-2167 (2010). Reviewer: Valery V. Karachik (Chelyabinsk) MSC: 33C45 37K10 65Q30 34M55 PDFBibTeX XMLCite \textit{Y. Chen} and \textit{D. Dai}, J. Approx. Theory 162, No. 12, 2149--2167 (2010; Zbl 1221.33015) Full Text: DOI arXiv
Gómez-Ullate, David; Kamran, Niky; Milson, Robert An extension of Bochner’s problem: exceptional invariant subspaces. (English) Zbl 1214.34079 J. Approx. Theory 162, No. 5, 987-1006 (2010). Reviewer: J. B. Butler jun. (Portland) MSC: 34L10 34L15 PDFBibTeX XMLCite \textit{D. Gómez-Ullate} et al., J. Approx. Theory 162, No. 5, 987--1006 (2010; Zbl 1214.34079) Full Text: DOI arXiv Link
Shapiro, Boris; Tater, Miloš On spectral polynomials of the Heun equation. I. (English) Zbl 1208.34143 J. Approx. Theory 162, No. 4, 766-781 (2010). Reviewer: John Schmeelk (Doha) MSC: 34M03 33E10 34L20 30D35 PDFBibTeX XMLCite \textit{B. Shapiro} and \textit{M. Tater}, J. Approx. Theory 162, No. 4, 766--781 (2010; Zbl 1208.34143) Full Text: DOI arXiv Link
Forrester, Peter J.; Ormerod, Christopher M. Differential equations for deformed Laguerre polynomials. (English) Zbl 1200.34112 J. Approx. Theory 162, No. 4, 653-677 (2010). Reviewer: Galina Filipuk (Warszawa) MSC: 34M55 34M56 PDFBibTeX XMLCite \textit{P. J. Forrester} and \textit{C. M. Ormerod}, J. Approx. Theory 162, No. 4, 653--677 (2010; Zbl 1200.34112) Full Text: DOI arXiv
Everitt, W. N.; Markett, C. Fourier-Bessel-type series: the fourth-order case. (English) Zbl 1183.33008 J. Approx. Theory 160, No. 1-2, 19-38 (2009). Reviewer: Nele De Schepper (Gent) MSC: 33C10 34L10 26A03 PDFBibTeX XMLCite \textit{W. N. Everitt} and \textit{C. Markett}, J. Approx. Theory 160, No. 1--2, 19--38 (2009; Zbl 1183.33008) Full Text: DOI
Borcea, Julius Choquet order for spectra of higher Lamé operators and orthogonal polynomials. (English) Zbl 1156.34068 J. Approx. Theory 151, No. 2, 164-180 (2008). Reviewer: Yuefei Wang (Beijing) MSC: 34L05 34L20 33C45 60E15 PDFBibTeX XMLCite \textit{J. Borcea}, J. Approx. Theory 151, No. 2, 164--180 (2008; Zbl 1156.34068) Full Text: DOI arXiv
Bergkvist, Tanja On asymptotics of polynomial eigenfunctions for exactly solvable differential operators. (English) Zbl 1155.34045 J. Approx. Theory 149, No. 2, 151-187 (2007). Reviewer: Zoran Kadelburg (Beograd) MSC: 34M99 34L20 47E05 34L10 PDFBibTeX XMLCite \textit{T. Bergkvist}, J. Approx. Theory 149, No. 2, 151--187 (2007; Zbl 1155.34045) Full Text: DOI arXiv
Deaño, Alfredo; Segura, Javier Global Sturm inequalities for the real zeros of the solutions of the Gauss hypergeometric differential equation. (English) Zbl 1145.33002 J. Approx. Theory 148, No. 1, 92-110 (2007). Reviewer: Wolfram Koepf (Kassel) MSC: 33C45 34C10 26D20 PDFBibTeX XMLCite \textit{A. Deaño} and \textit{J. Segura}, J. Approx. Theory 148, No. 1, 92--110 (2007; Zbl 1145.33002) Full Text: DOI Link
Durán, Antonio J.; Grünbaum, F. Alberto Matrix orthogonal polynomials satisfying second-order differential equations: coping without help from group representation theory. (English) Zbl 1221.42046 J. Approx. Theory 148, No. 1, 35-48 (2007). Reviewer: Marcel G. de Bruin (Haarlem) MSC: 42C05 15A24 22E45 34B30 PDFBibTeX XMLCite \textit{A. J. Durán} and \textit{F. A. Grünbaum}, J. Approx. Theory 148, No. 1, 35--48 (2007; Zbl 1221.42046) Full Text: DOI
Jerome, Joseph W.; Linnér, Anders Efficient approximation of implicitly defined functions: general theorems and classical benchmark studies. (English) Zbl 1122.34011 J. Approximation Theory 145, No. 1, 81-99 (2007). MSC: 34B15 41A05 41-04 65L10 65L70 41A15 PDFBibTeX XMLCite \textit{J. W. Jerome} and \textit{A. Linnér}, J. Approx. Theory 145, No. 1, 81--99 (2007; Zbl 1122.34011) Full Text: DOI
Djakov, Plamen; Mityagin, Boris Trace formula and spectral Riemann surfaces for a class of tri-diagonal matrices. (English) Zbl 1118.47022 J. Approximation Theory 139, No. 1-2, 293-326 (2006). Reviewer: Zoran Kadelburg (Belgrade) (MR 2006m:47056) MSC: 47B36 15A15 15A18 34L20 47A10 47B39 47N50 PDFBibTeX XMLCite \textit{P. Djakov} and \textit{B. Mityagin}, J. Approx. Theory 139, No. 1--2, 293--326 (2006; Zbl 1118.47022) Full Text: DOI arXiv
Gesztesy, Fritz; Zinchenko, Maxim Weyl–Titchmarsh theory for CMV operators associated with orthogonal polynomials on the unit circle. (English) Zbl 1118.47023 J. Approximation Theory 139, No. 1-2, 172-213 (2006). Reviewer: J.V.Baxley (MR 2007f:47027) MSC: 47B36 34L40 34B20 41A30 42C05 47A10 PDFBibTeX XMLCite \textit{F. Gesztesy} and \textit{M. Zinchenko}, J. Approx. Theory 139, No. 1--2, 172--213 (2006; Zbl 1118.47023) Full Text: DOI arXiv
Djakov, Plamen; Mityagin, Boris Simple and double eigenvalues of the Hill operator with a two-term potential. (English) Zbl 1080.34066 J. Approximation Theory 135, No. 1, 70-104 (2005). Reviewer: Marek S. Karaś (Kraków) (MR2151250) MSC: 34L20 34L40 47E05 PDFBibTeX XMLCite \textit{P. Djakov} and \textit{B. Mityagin}, J. Approx. Theory 135, No. 1, 70--104 (2005; Zbl 1080.34066) Full Text: DOI
Durán, Antonio J.; Grünbaum, F. Alberto Orthogonal matrix polynomials, scalar-type Rodrigues formulas and Pearson equations. (English) Zbl 1066.42018 J. Approximation Theory 134, No. 2, 267-280 (2005). MSC: 42C05 33C47 34A30 PDFBibTeX XMLCite \textit{A. J. Durán} and \textit{F. A. Grünbaum}, J. Approx. Theory 134, No. 2, 267--280 (2005; Zbl 1066.42018) Full Text: DOI
Deaño, Alfredo; Gil, Amparo; Segura, Javier New inequalities from classical Sturm theorems. (English) Zbl 1065.33004 J. Approximation Theory 131, No. 2, 208-230 (2004). Reviewer: José L. Lopez (Pamplona) MSC: 33C15 34C10 26D20 PDFBibTeX XMLCite \textit{A. Deaño} et al., J. Approx. Theory 131, No. 2, 208--230 (2004; Zbl 1065.33004) Full Text: DOI Link
Martínez-Finkelshtein, A.; Saff, E. B. Asymptotic properties of Heine–Stieltjes and Van Vleck polynomials. (English) Zbl 1099.33502 J. Approximation Theory 118, No. 1, 131-151 (2002). MSC: 33C45 34B30 PDFBibTeX XMLCite \textit{A. Martínez-Finkelshtein} and \textit{E. B. Saff}, J. Approx. Theory 118, No. 1, 131--151 (2002; Zbl 1099.33502) Full Text: DOI
Kwon, K. H.; Littlejohn, L. L.; Yoon, G. J. Orthogonal polynomial solutions of spectral type differential equations: Magnus’ conjecture. (English) Zbl 0994.33003 J. Approximation Theory 112, No. 2, 189-215 (2001). Reviewer: Matthew He (Ft.Lauderdale) MSC: 33C45 34L10 PDFBibTeX XMLCite \textit{K. H. Kwon} et al., J. Approx. Theory 112, No. 2, 189--215 (2001; Zbl 0994.33003) Full Text: DOI
Dunster, T. M. Uniform asymptotic expansions for Charlier polynomials. (English) Zbl 0991.41020 J. Approximation Theory 112, No. 1, 93-133 (2001). Reviewer: Matthew He (Ft.Lauderdale) MSC: 41A60 33C45 34E20 PDFBibTeX XMLCite \textit{T. M. Dunster}, J. Approx. Theory 112, No. 1, 93--133 (2001; Zbl 0991.41020) Full Text: DOI Link
Deift, P.; Kriecherbauer, T.; McLaughlin, K. T.-R. New results on the equilibrium measure for logarithmic potentials in the presence of an external field. (English) Zbl 0918.31001 J. Approximation Theory 95, No. 3, 388-475 (1998). Reviewer: A.Martínez Finkelshtein (Almeria) MSC: 31A15 31A35 34C10 42C05 35Q58 37K15 PDFBibTeX XMLCite \textit{P. Deift} et al., J. Approx. Theory 95, No. 3, 388--475 (1998; Zbl 0918.31001) Full Text: DOI
Abdelaziz, Nazar H. On approximation by discrete semigroups. (English) Zbl 0786.41026 J. Approximation Theory 73, No. 3, 253-269 (1993). Reviewer: I.Şerb (Cluj-Napoca) MSC: 41A65 47D03 34G10 PDFBibTeX XMLCite \textit{N. H. Abdelaziz}, J. Approx. Theory 73, No. 3, 253--269 (1993; Zbl 0786.41026) Full Text: DOI
Máté, Attila; Nevai, Paul A generalization of Poincaré’s theorem for recurrence equations. (English) Zbl 0715.34131 J. Approximation Theory 63, No. 1, 92-97 (1990). Reviewer: Yu.V.Rogovchenko MSC: 34K25 34E05 39A10 PDFBibTeX XMLCite \textit{A. Máté} and \textit{P. Nevai}, J. Approx. Theory 63, No. 1, 92--97 (1990; Zbl 0715.34131) Full Text: DOI
Jones, Gary D.; Keener, Marvin Properties of minors of the Wronskian for solutions of \(L_ ny+p(x)y=0\) as related to (k,n-k) disfocality. (English) Zbl 0702.34010 J. Approximation Theory 59, No. 1, 87-106 (1989). Reviewer: S.Aizicovici MSC: 34A30 47E05 PDFBibTeX XMLCite \textit{G. D. Jones} and \textit{M. Keener}, J. Approx. Theory 59, No. 1, 87--106 (1989; Zbl 0702.34010) Full Text: DOI
Muldowney, James S. Markov systems of vector-valued functions and disconjugacy. (English) Zbl 0702.34009 J. Approximation Theory 59, No. 1, 53-72 (1989). Reviewer: M.Idemen MSC: 34A30 34B10 PDFBibTeX XMLCite \textit{J. S. Muldowney}, J. Approx. Theory 59, No. 1, 53--72 (1989; Zbl 0702.34009) Full Text: DOI
Clark, Dean S. Generalization of an inequality of Gronwall-Reid. (English) Zbl 0684.34011 J. Approximation Theory 58, No. 1, 12-14 (1989). Reviewer: Rao Lakshmana MSC: 34A40 28A25 PDFBibTeX XMLCite \textit{D. S. Clark}, J. Approx. Theory 58, No. 1, 12--14 (1989; Zbl 0684.34011) Full Text: DOI
Erbe, L. H. Generalized disconjugacy and comparison theorems. (English) Zbl 0682.34030 J. Approximation Theory 59, No. 1, 107-115 (1989). MSC: 34C20 47E05 PDFBibTeX XMLCite \textit{L. H. Erbe}, J. Approx. Theory 59, No. 1, 107--115 (1989; Zbl 0682.34030) Full Text: DOI
Müllenheim, Gregor Some new recursion relations for spline functions with application to spline collocation. (English) Zbl 0742.65008 J. Approximation Theory 58, No. 2, 201-212 (1989). MSC: 65D05 65D07 65L10 41A15 34B15 PDFBibTeX XMLCite \textit{G. Müllenheim}, J. Approx. Theory 58, No. 2, 201--212 (1989; Zbl 0742.65008) Full Text: DOI
Ziętak, K. Properties of the strict Chebyshev solutions of the linear matrix equation \(AX+YB=C\). (English) Zbl 0672.41019 J. Approximation Theory 55, No. 2, 140-149 (1988). Reviewer: Zhang Ganglu (Dongying) MSC: 41A50 41A65 34A30 PDFBibTeX XMLCite \textit{K. Ziętak}, J. Approx. Theory 55, No. 2, 140--149 (1988; Zbl 0672.41019) Full Text: DOI
Divis, Zita A note on the rate of convergence of Sturm-Liouville expansions. (English) Zbl 0618.34025 J. Approximation Theory 50, 200-202 (1987). Reviewer: A.Boucherif MSC: 34L99 PDFBibTeX XMLCite \textit{Z. Divis}, J. Approx. Theory 50, 200--202 (1987; Zbl 0618.34025) Full Text: DOI
Hristova, S. G.; Bainov, D. D. A projection-iterative method for finding periodic solutions of nonlinear systems of difference-differential equations with impulses. (English) Zbl 0611.34032 J. Approximation Theory 49, 311-320 (1987). Reviewer: P.Drábek MSC: 34C25 65L60 PDFBibTeX XMLCite \textit{S. G. Hristova} and \textit{D. D. Bainov}, J. Approx. Theory 49, 311--320 (1987; Zbl 0611.34032) Full Text: DOI
Goodman, T. N. T.; Schoenberg, I. J.; Sharma, A. Piecewise smooth solutions of some difference-differential equations. (English) Zbl 0606.34040 J. Approximation Theory 48, 262-271 (1986). MSC: 34K05 41A15 PDFBibTeX XMLCite \textit{T. N. T. Goodman} et al., J. Approx. Theory 48, 262--271 (1986; Zbl 0606.34040) Full Text: DOI
Sakai, Manabu; Usmani, Riaz A. On exponential splines. (English) Zbl 0603.41007 J. Approximation Theory 47, 122-131 (1986). Reviewer: E.Neumann MSC: 41A15 65D07 34B10 34D15 PDFBibTeX XMLCite \textit{M. Sakai} and \textit{R. A. Usmani}, J. Approx. Theory 47, 122--131 (1986; Zbl 0603.41007) Full Text: DOI
Bogar, Gary A.; Jeppson, Ronald M. Restricted range approximate solutions of nonlinear differential systems with boundary conditions. (English) Zbl 0585.34007 J. Approximation Theory 47, 26-41 (1986). MSC: 34A45 34A34 34B99 PDFBibTeX XMLCite \textit{G. A. Bogar} and \textit{R. M. Jeppson}, J. Approx. Theory 47, 26--41 (1986; Zbl 0585.34007) Full Text: DOI
Frigerio, A.; Lewis, J. T.; Pulè, J. V. The averaging method for asymptotic evolutions. II. Quantum open systems. (English) Zbl 0576.34040 J. Approximation Theory 45, 310-338 (1985). MSC: 34C29 81Q15 PDFBibTeX XMLCite \textit{A. Frigerio} et al., J. Approx. Theory 45, 310--338 (1985; Zbl 0576.34040) Full Text: DOI
Görlich, E.; Pontzen, D. Convergence rates of \(\alpha\)-stable difference methods. (English) Zbl 0538.65033 J. Approximation Theory 41, 291-296 (1984). MSC: 65J10 65L05 65M12 34G10 65M30 47D03 PDFBibTeX XMLCite \textit{E. Görlich} and \textit{D. Pontzen}, J. Approx. Theory 41, 291--296 (1984; Zbl 0538.65033) Full Text: DOI
Adomian, G. Approximate calculation of Green’s functions. (English) Zbl 0509.34021 J. Approximation Theory 37, 119-124 (1983). MSC: 34B27 60H10 PDFBibTeX XMLCite \textit{G. Adomian}, J. Approx. Theory 37, 119--124 (1983; Zbl 0509.34021) Full Text: DOI
Mountain, J. K. The Lax equivalence theorem for linear inhomogeneous equations in \(L^ 2\) spaces. (English) Zbl 0485.65038 J. Approximation Theory 33, 126-130 (1981). MSC: 65J10 35G10 35K25 34G10 65L05 49J20 65M12 PDFBibTeX XMLCite \textit{J. K. Mountain}, J. Approx. Theory 33, 126--130 (1981; Zbl 0485.65038) Full Text: DOI
Kaufman, Robert Metric entropy and ordinary differential equations. (English) Zbl 0532.41028 J. Approximation Theory 30, 203-207 (1980). Reviewer: A.Bleyer MSC: 41A46 34A99 PDFBibTeX XMLCite \textit{R. Kaufman}, J. Approx. Theory 30, 203--207 (1980; Zbl 0532.41028) Full Text: DOI
Stafney, James D. Density of the linear span of principal solutions of second order linear differential equations. (English) Zbl 0484.34004 J. Approximation Theory 30, 226-236 (1980). MSC: 34A45 41A10 41A45 34A30 PDFBibTeX XMLCite \textit{J. D. Stafney}, J. Approx. Theory 30, 226--236 (1980; Zbl 0484.34004) Full Text: DOI
McCoy, Peter A. Polynomial approximation of generalized biaxisymmetric potentials. (English) Zbl 0462.41002 J. Approximation Theory 25, 153-168 (1979). MSC: 41A10 41A25 31B30 34B15 PDFBibTeX XMLCite \textit{P. A. McCoy}, J. Approx. Theory 25, 153--168 (1979; Zbl 0462.41002) Full Text: DOI
Gilbert, R. P.; Schneider, M. On a class of boundary value problems for a composite system of first order differential equations. (English) Zbl 0434.34011 J. Approximation Theory 25, 105-119 (1979). MSC: 34B05 PDFBibTeX XMLCite \textit{R. P. Gilbert} and \textit{M. Schneider}, J. Approx. Theory 25, 105--119 (1979; Zbl 0434.34011) Full Text: DOI
Athavale, Manohar L.; Wahba, Grace Determination of an optimal mesh for a collocation-projection method for solving two-point boundary value problems. (English) Zbl 0409.65036 J. Approximation Theory 25, 38-49 (1979). MSC: 65L10 34B05 65J10 62C12 62L20 PDFBibTeX XMLCite \textit{M. L. Athavale} and \textit{G. Wahba}, J. Approx. Theory 25, 38--49 (1979; Zbl 0409.65036) Full Text: DOI
Kösters, H. W.; Schempp, Walter L-Splines als schwache Lösungen von verallgemeinerten Randwertproblemen. (German) Zbl 0368.34006 J. Approximation Theory 22, 206-222 (1978). MSC: 34A45 34B05 41A15 65L10 PDFBibTeX XMLCite \textit{H. W. Kösters} and \textit{W. Schempp}, J. Approx. Theory 22, 206--222 (1978; Zbl 0368.34006) Full Text: DOI
Wahba, Grace On the optimal choice of nodes in the collocation-projection method for solving linear operator equations. (English) Zbl 0329.65040 J. Approximation Theory 16, 175-186 (1976). MSC: 65J05 65L10 47A50 34B05 PDFBibTeX XMLCite \textit{G. Wahba}, J. Approx. Theory 16, 175--186 (1976; Zbl 0329.65040) Full Text: DOI
Wahba, Grace A class of approximate solutions to linear operator equations. (English) Zbl 0267.45015 J. Approximation Theory 9, 61-77 (1973). MSC: 45J05 65R20 34A45 PDFBibTeX XMLCite \textit{G. Wahba}, J. Approx. Theory 9, 61--77 (1973; Zbl 0267.45015) Full Text: DOI
Huffstutler, R. G.; Vorheis, R. Orthogonal polynomial solutions of even-ordered ordinary differential equations. (English) Zbl 0249.42014 J. Approximation Theory 7, 163-166 (1973). MSC: 42C05 33C45 34A30 PDFBibTeX XMLCite \textit{R. G. Huffstutler} and \textit{R. Vorheis}, J. Approx. Theory 7, 163--166 (1973; Zbl 0249.42014) Full Text: DOI
Karlin, Samuel Total positivity, interpolation by splines, and Green’s functions of differential operators. (English) Zbl 0228.41002 J. Approximation Theory 4, 91-112 (1971). MSC: 41A05 41A15 47E05 34B27 PDFBibTeX XMLCite \textit{S. Karlin}, J. Approx. Theory 4, 91--112 (1971; Zbl 0228.41002) Full Text: DOI
Henry, Myron S. Best \(L_ q\) approximate solutions of certain systems of differential equations. (English) Zbl 0223.34017 J. Approximation Theory 4, 339-345 (1971). MSC: 34A45 PDFBibTeX XMLCite \textit{M. S. Henry}, J. Approx. Theory 4, 339--345 (1971; Zbl 0223.34017) Full Text: DOI