Butzer, Paul L.; Stens, Rudolf L. A retrospective on research visits of Paul Butzer’s Aachen research group to Eastern Europe and Tenerife. (English) Zbl 1511.01024 Sampl. Theory Signal Process. Data Anal. 20, No. 2, Paper No. 17, 32 p. (2022). Reviewer: Robert W. van der Waall (Huizen) MSC: 01A70 PDFBibTeX XMLCite \textit{P. L. Butzer} and \textit{R. L. Stens}, Sampl. Theory Signal Process. Data Anal. 20, No. 2, Paper No. 17, 32 p. (2022; Zbl 1511.01024) Full Text: DOI
Bustamante, J.; Merino-García, J. J.; Quesada, J. M. Estimates for the modulus of continuity in the Jacobi frame. (English) Zbl 1486.41008 J. Approx. Theory 273, Article ID 105659, 16 p. (2022). Reviewer: Zoltán Finta (Cluj-Napoca) MSC: 41A25 41A10 41A36 PDFBibTeX XMLCite \textit{J. Bustamante} et al., J. Approx. Theory 273, Article ID 105659, 16 p. (2022; Zbl 1486.41008) Full Text: DOI
Bardaro, Carlo; Butzer, Paul L.; Mantellini, Ilaria The foundations of fractional calculus in the Mellin transform setting with applications. (English) Zbl 1334.47047 J. Fourier Anal. Appl. 21, No. 5, 961-1017 (2015). Reviewer: Shaochun Ji (Huaian) MSC: 47G10 26A33 44A15 PDFBibTeX XMLCite \textit{C. Bardaro} et al., J. Fourier Anal. Appl. 21, No. 5, 961--1017 (2015; Zbl 1334.47047) Full Text: DOI arXiv
Xu, Yuan Generalized translation operator and approximation in several variables. (English) Zbl 1083.42023 J. Comput. Appl. Math. 178, No. 1-2, 489-512 (2005). Reviewer: Mariano Gasca (Zaragoza) MSC: 42C15 33C50 41A30 41A63 PDFBibTeX XMLCite \textit{Y. Xu}, J. Comput. Appl. Math. 178, No. 1--2, 489--512 (2005; Zbl 1083.42023) Full Text: DOI arXiv
Rafalson, Semyon An extremal relation of the theory of approximation of functions by algebraic polynomials. (English) Zbl 0981.41006 J. Approximation Theory 110, No. 2, 146-170 (2001). Reviewer: Laszlo Leindler (Szeged) MSC: 41A10 41A17 PDFBibTeX XMLCite \textit{S. Rafalson}, J. Approx. Theory 110, No. 2, 146--170 (2001; Zbl 0981.41006) Full Text: DOI
Görlich, E.; Krieg, A.; Nessel, R. J.; Stens, R. L. Paul L. Butzer – five years as Professor Emeritus. (English) Zbl 0973.01079 Result. Math. 34, No. 1-2, 20-31 (1998). MSC: 01A70 PDFBibTeX XMLCite \textit{E. Görlich} et al., Result. Math. 34, No. 1--2, 20--31 (1998; Zbl 0973.01079) Full Text: DOI
Butzer, Paul L.; Jansche, Stefan A direct approach to the Mellin transform. (English) Zbl 0885.44004 J. Fourier Anal. Appl. 3, No. 4, 325-376 (1997). Reviewer: Ram Kishore Saxena (Jodhpur) MSC: 44A15 44-03 35K05 35L05 35A22 PDFBibTeX XMLCite \textit{P. L. Butzer} and \textit{S. Jansche}, J. Fourier Anal. Appl. 3, No. 4, 325--376 (1997; Zbl 0885.44004) Full Text: DOI EuDML
Dickmeis, W.; Nessel, R. J. A unified approach to certain counterexamples in approximation theory in connection with a uniform boundedness principle with rates. (English) Zbl 0473.41028 J. Approximation Theory 31, 161-174 (1981). MSC: 41A65 41A25 41A35 41A55 PDFBibTeX XMLCite \textit{W. Dickmeis} and \textit{R. J. Nessel}, J. Approx. Theory 31, 161--174 (1981; Zbl 0473.41028) Full Text: DOI
Butzer, Paul L.; Stens, R. L.; Wehrens, M. Saturation classes of the Cesaro and Abel-Poisson means of Fourier- Legendre series. (English) Zbl 0396.41010 Acta Math. Acad. Sci. Hung. 33, 19-35 (1979). MSC: 41A40 41A25 42C10 41A10 PDFBibTeX XMLCite \textit{P. L. Butzer} et al., Acta Math. Acad. Sci. Hung. 33, 19--35 (1979; Zbl 0396.41010) Full Text: DOI
Görlich, E.; Markett, C. On approximation by Cesaro means of the Laguerre expansion and best approximation. (English) Zbl 0388.42008 Result. Math. 2, 124-150 (1979). MSC: 42C10 42A85 41A10 41A50 40G05 PDFBibTeX XMLCite \textit{E. Görlich} and \textit{C. Markett}, Result. Math. 2, 124--150 (1979; Zbl 0388.42008) Full Text: DOI