English

Computability of a Whitney Extension

Logic 2026-04-07 v2 Classical Analysis and ODEs

Abstract

We prove the computability of a version of Whitney Extension, when the input is suitably represented. More specifically, if FRnF \subseteq \mathbb{R}^n is a closed set represented so that the distance function xd(x,F)x \mapsto d(x,F) can be computed, and (f(kˉ))kˉm(f^{(\bar{k})})_{|\bar{k}| \le m} is a Whitney jet of order mm on FF, then we can compute gCm(Rn)g \in C^{m}(\mathbb{R}^n) such that gg and its partial derivatives coincide on FF with the corresponding functions of (f(kˉ))kˉm(f^{(\bar{k})})_{|\bar{k}| \le m}.

Keywords

Cite

@article{arxiv.2507.02113,
  title  = {Computability of a Whitney Extension},
  author = {Andrea Brun and Guido Gherardi and Alberto Marcone},
  journal= {arXiv preprint arXiv:2507.02113},
  year   = {2026}
}

Comments

36 pages, 3 figures; revised after referees' comments

R2 v1 2026-07-01T03:43:57.350Z