204 citations
- Forschungszentrum JülichDE15 papers
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Showing 2014 · math.CVShow all
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math.CV2014★ 2 cited
Sharp Markov-type Inequalities for Rational Functions on Several Intervals
M. A. Akturk, A. Lukashov
In this paper, we give sharp Rusak- and Markov-type inequalities for rational functions on several intervals when the system of intervals is a \textquotedblleft rational function i…
math.CV2014
Approximation of sgn(x) on two symmetric intervals by rational functions with fixed poles
A. Lukashov, D. Prokhorov
Recently A. Eremenko and P. Yuditskii found explicit solutions of the best polynomial approximation problems of sgn(x) over two intervals in terms of conformal mappings onto specia…