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Bernstein Polynomials and Modulus of Continuity

open access: yesJournal of Approximation Theory, 2000
The author describes several properties related to the first order modulus of continuity, which are preserved by the operator given by Bernstein polynomials. Let the function \(\omega(t)\) on \([0,1]\) be a modulus of continuity. By \(H^\omega\) we denote the class of continuous functions on \([0,1]\) satisfying the inequality \(\omega(f,t)\leq\omega(t)
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Refinement of vectors of Bernstein polynomials

open access: yes, 2017
Let \(n\in\mathbb{N}\) and let \({\mathbf G}^n(t):= (G^n_0(t),\dots, G^n_n(t))^T\) be a vector of uniformly refinable real functions on \([0,1]\); that is, there are \((n+ 1)\times(n+ 1)\) matrices \({\mathbf A}^n_0,\dots,{\mathbf A}^n_{k- 1}\) (\(k\in \mathbb{N}\), \(k\geq 2\)) such that \[ {\mathbf G}^n\Biggl({t+ m\over k}\Biggr)={\mathbf A}^n_m ...
Berg, Lothar, Plonka-Hoch, Gerlind
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