Abstract
Let \({\left(\tau_j\right)_{j\in\mathbb{N}}}\) be a sequence of strictly positive real numbers, and let A be the generator of a bounded analytic semigroup in a Banach space X. Put \({A_n=\prod_{j=1}^n\left(I+\frac{1}{2} \tau_jA\right) \left(I-\frac{1}{2} \tau_jA\right)^{-1}}\), and let \({x\in X}\). Define the sequence \({\left(x_n\right)_{n\in\mathbb{N}}\subset X}\) by the Crank–Nicolson scheme: x n = A n x. In this paper, it is proved that the Crank–Nicolson scheme is stable in the sense that \({\sup_{n\in\mathbb{N}}\left\Vert A_nx\right\Vert<\infty}\). Some convergence results are also given.
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The author is grateful to Sergey Piskarev for suggesting him the problem which is treated in the present paper, and for his comments. Thanks are also due to an anonymous referee for suggestions to improve the quality of an earlier version of the article. He also thanks the University of Antwerp and the Flemish Fund for Scientific Research for their financial and logistic support.
An erratum to this article can be found at http://dx.doi.org/10.1007/s00028-011-0108-0
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van Casteren, J.A. On the Crank-Nicolson scheme once again. J. Evol. Equ. 11, 457–476 (2011). https://doi.org/10.1007/s00028-010-0084-9
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DOI: https://doi.org/10.1007/s00028-010-0084-9