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Computable analysis of the abstract Cauchy problem in a Banach space and its applications I

✍ Scribed by Klaus Weihrauch; Ning Zhong


Publisher
John Wiley and Sons
Year
2007
Tongue
English
Weight
222 KB
Volume
53
Category
Article
ISSN
0044-3050

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✦ Synopsis


Abstract

We study computability of the abstract linear Cauchy problem

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where A is a linear operator, possibly unbounded, on a Banach space X. We give necessary and sufficient conditions for A such that the solution operator K: x ↦ u of the problem (1) is computable. For studying computability we use the representation approach to computable analysis developed by Weihrauch and others. This approach is consistent with the model used by Pour‐El/Richards. (Β© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)


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We present a new variant of the simultaneous Stone-Weierstrass approximation of a function and its partial derivatives, when the function takes its values in a Banach space, and provide an explicit and direct computation of this approximation. In the particular case of approximation by means of poly