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Found 51 Documents (Results 1–51)

The Helly theorem for cones and the duality in the best fractional rational approximations. (English. Russian original) Zbl 1041.41016

Vestn. St. Petersbg. Univ., Math. 31, No. 4, 14-18 (1998); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 1998, No. 4, 16-20 (1998).
MSC:  41A20 41A50
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On characterization of solution for a copositive fractionally rational approximation problem. (English. Russian original) Zbl 1041.41014

Vestn. St. Petersbg. Univ., Math. 31, No. 3, 1-3 (1998); translation from Vestn. St-Peterbg. Univ., Ser. I, Mat. Mekh. Astron. 1998, No. 3, 3-5 (1998).
MSC:  41A20 41A29
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Padé type approximants with preassigned zeros. (English) Zbl 0971.41008

Bank, Bernd (ed.) et al., 3rd international conference on approximation and optimization in the Caribbean, Puebla, México, October 8-13, 1995. México: Sociedad Matemática Mexicana. Aportaciones Mat., Comun. 24, 11-18 (1998).
MSC:  41A20 30E10 65D05
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Best rational approximations and estimates for deviations of rational operators. (Russian) Zbl 0947.41009

Samoilenko, A. M. (ed.) et al., Fourier series: Theory and applications. Section: Function theory. Kyïv: Instytut Matematyky NAN Ukraïny. Pr. Inst. Mat. Nats. Akad. Nauk Ukr., Mat. Zastos. 20, 255-262 (1998).
MSC:  41A20 41A35
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Interpolation of Nevanlinna functions by rationals with poles on the real line. (English) Zbl 0928.30018

Jones, William B. (ed.) et al., Orthogonal functions, moment theory, and continued fractions: theory and applications. Proceedings of a research conference/workshop, Campinas, São Paulo, Brazil, June 19–28, 1996. New York, NY: Marcel Dekker. Lect. Notes Pure Appl. Math. 199, 101-110 (1998).
MSC:  30E05 30E15 41A20
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\(L_p\) convergence of Lagrange-type interpolation in the rational space. (English) Zbl 0923.41007

Chui, Charles K. (ed.) et al., Approximation theory IX. Volume 1. Theoretical aspects. Proceedings of the 9th international conference, Nashville, TN, USA, January 3–6, 1998. Nashville, TN: Vanderbilt University Press. Innovations in Applied Mathematics. 255-262 (1998).
MSC:  41A20
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On approximation of Cauchy-type integrals by sequences of rational functions with preassigned poles. (English) Zbl 0926.30025

Chui, Charles K. (ed.) et al., Approximation theory IX. Volume 1. Theoretical aspects. Proceedings of the 9th international conference, Nashville, TN, USA, January 3–6, 1998. Nashville, TN: Vanderbilt University Press. Innovations in Applied Mathematics. 331-338 (1998).
MSC:  30E20 41A20
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Rational approximation in logarithmic capacity of meromorphic maps from \(C^n\) to \(C^m\). (English) Zbl 0935.41012

Chui, Charles K. (ed.) et al., Approximation theory IX. Volume 1. Theoretical aspects. Proceedings of the 9th international conference, Nashville, TN, USA, January 3-6, 1998. Nashville, TN: Vanderbilt University Press. Innovations in Applied Mathematics. 239-245 (1998).
MSC:  41A20 32H04
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Ray sequences of best rational approximants to entire functions. (English) Zbl 0947.41008

Chui, Charles K. (ed.) et al., Approximation theory IX. Volume 1. Theoretical aspects. Proceedings of the 9th international conference, Nashville, TN, USA, January 3-6, 1998. Nashville, TN: Vanderbilt University Press. Innovations in Applied Mathematics. 175-200 (1998).
Reviewer: E.Deeba (Houston)
MSC:  41A20
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On the irrationality of \(\sum_{i=0}^\infty q^{-i}\prod_{j=0}^i(1+q^{-j}r+q^{-2j}s)\). (English) Zbl 0930.11052

Chui, Charles K. (ed.) et al., Approximation theory IX. Volume 1. Theoretical aspects. Proceedings of the 9th international conference, Nashville, TN, USA, January 3–6, 1998. Nashville, TN: Vanderbilt University Press. Innovations in Applied Mathematics. 51-58 (1998).
MSC:  11J72 41A21 41A20
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Smooth rational cubic spline interpolation. (English) Zbl 0904.65007

Dæhlen, Morten (ed.) et al., Mathematical methods for curves and surfaces II. 2nd international conference, Lillehammer, Norway, July 3–8, 1997. Nashville, TN: Vanderbilt Univ. Press. 17-24 (1998).
MSC:  65D05 65D07 41A20
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Complex rational approximation and difference operators. (English) Zbl 0917.47028

Proceedings of the 3rd international conference on functional analysis and approximation theory, Acquafredda di Maratea (Potenza), Italy, September 23–28, 1996. Vols. I and II. Palermo: Circolo Matemàtico di Palermo, Suppl. Rend. Circ. Mat. Palermo, II. Ser. 52, 3-21 (1998).
MSC:  47B39 41A20
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