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Archive for Rational Mechanics and Analysis | 1964

Nicht-lineare approximationen

Günter Meinardus

Es sei B ein Kompaktum und C(B) der lineare Raum der auf B stetigen, reell- oder und komplexwertigen Funktionen f(x), der mit der Tschebyscheff-Norm


Transactions of the American Mathematical Society | 1972

Converse theorems and extensions in Chebyshev rational approximation to certain entire functions in [∗∗∗(∗∗0,+∞)∗∗∗∗∗

Günter Meinardus; A.R Reddy; G. D. Taylor; Richard S. Varga


Archive | 1978

Zur Periodischen Spline-Interpolation II

Günter Meinardus; G. Merz

||f|| = \mathop {Max}\limits_{x \in B} ||f(x)||


Archive | 1980

Hermite-Interpolation mit Periodischen Spline-Funktionen

Günter Meinardus; Gerhard Merz


Computing | 1966

Über die Approximation asymptotischer Entwicklungen I

Günter Meinardus

versehen sei. Haufig ist das folgende Approximationsproblem von Bedeutung: Es sei eine Parametermenge A von Elementen a, b, ...gegeben.


Computing | 1971

Über ein Problem von L. Collatz

Günter Meinardus

Recently, it has been shown that the problem of rational approximation to e~~ in [O, + <*>) arises naturally in numerical methods for approximating solutions of heat-conduction-type partial differential equations [l] , [2]. This special approximation problem leads one to the general question of approximating functions on the half line [0, + 00 ). In this paper we wish to announce two results of this study which are in the spirit of work done by S. N. Bernstein. A complete description of this work with proofs of these results and additional results will appear elsewhere. In order to state these results, we need the following notation. For any nonnegative integer w, let irm denote the collection of all real polynomials of degree at most m. For given r>0 and s> 1, let S(r, s) denote the unique open ellipse in the complex plane with foci at x = 0 and x = r and semimajor and semiminor axes a and b such that b/a = (s — l)/(s+l). Finally, if f(z) is any entire function, we set


Bit Numerical Mathematics | 1998

Best Approximation by Free Knot Splines

Günter Meinardus; Guido Walz

Es sei CN der lineare Raum der auf der reellen Achse stetigen Funktionen mit der Periode N und S N 2k−1 der lineare Raum der Splinefunktionen der Periode N und vom Grad 2k−1, deren Knoten in den ganzen Zahlen liegen (k, N∈ℕ). Zu vorgegebenem f∈CN besitzt das Interpolationsproblem


Results in Mathematics | 1994

Functional Equations Connected With The Collatz Problem

Lothar Berg; Günter Meinardus


Advances in Computational Mathematics | 1996

Bivariate segment approximation and splines

Günter Meinardus; Günther Nürnberger; Guido Walz

s(v) = f(v),v \in Z


Computers & Mathematics With Applications | 1997

Some results in segmented approximation

Günter Meinardus

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Guido Walz

University of Mannheim

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G.D Taylor

Michigan State University

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H. Strauss

University of Erlangen-Nuremberg

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K.P. Hadeler

University of Tübingen

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Manfred Sommer

University of Erlangen-Nuremberg

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