Whitney approximation: domains and bounds

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Bibliographic Details
Title: Whitney approximation: domains and bounds
Authors: Aschenbrenner, Matthias
Source: Complex Variables and Elliptic Equations. :1-28
Publication Status: Preprint
Publisher Information: Informa UK Limited, 2025.
Publication Year: 2025
Subject Terms: Complex Variables, Classical Analysis and ODEs, Classical Analysis and ODEs (math.CA), FOS: Mathematics, Complex Variables (math.CV)
Description: We investigate properties of holomorphic extensions in the one-variable case of Whitney's Approximation Theorem on intervals. Improving a result of Gauthier-Kienzle, we construct tangentially approximating functions which extend holomorphically to domains of optimal size. For approximands on unbounded closed intervals, we also bound the growth of holomorphic extensions, in the spirit of Arakelyan, Bernstein, Keldych, and Kober.
23 pp.; Complex Var. Elliptic Equ., to appear
Document Type: Article
Language: English
ISSN: 1747-6941
1747-6933
DOI: 10.1080/17476933.2025.2549398
DOI: 10.48550/arxiv.2504.12839
Access URL: http://arxiv.org/abs/2504.12839
Rights: CC BY NC ND
arXiv Non-Exclusive Distribution
Accession Number: edsair.doi.dedup.....a853b9f21a5dab1a0b0d68fa42327b6c
Database: OpenAIRE
Description
Abstract:We investigate properties of holomorphic extensions in the one-variable case of Whitney's Approximation Theorem on intervals. Improving a result of Gauthier-Kienzle, we construct tangentially approximating functions which extend holomorphically to domains of optimal size. For approximands on unbounded closed intervals, we also bound the growth of holomorphic extensions, in the spirit of Arakelyan, Bernstein, Keldych, and Kober.<br />23 pp.; Complex Var. Elliptic Equ., to appear
ISSN:17476941
17476933
DOI:10.1080/17476933.2025.2549398