This is an announcement for the paper "On the extension of H"{o}lder maps with values in spaces of continuous functions" by Gilles Lancien and Beata Randrianantoanina.

Abstract: We study the isometric extension problem for H"{o}lder maps from subsets of any Banach space into $c_0$ or into a space of continuous functions. For a Banach space $X$, we prove that any $\alpha$-H"{o}lder map, with $0<\alpha\leq 1$, from a subset of $X$ into $c_0$ can be isometrically extended to $X$ if and only if $X$ is finite dimensional. For a finite dimensional normed space $X$ and for a compact metric space $K$, we prove that the set of $\alpha$'s for which all $\alpha$-H"{o}lder maps from a subset of $X$ into $C(K)$ can be extended isometrically is either $(0,1]$ or $(0,1)$ and we give examples of both occurrences. We also prove that for any metric space $X$, the described above set of $\al$'s does not depend on $K$, but only on finiteness of $K$.

Archive classification: Functional Analysis

Mathematics Subject Classification: 46B20 (46T99, 54C20, 54E35)

Remarks: 16 pages

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Submitted from: randrib@muohio.edu

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