Functional Calculus in Hölder-Zygmund Spaces
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- by G. Bourdaud and Massimo Lanza de Cristoforis PDF
- Trans. Amer. Math. Soc. 354 (2002), 4109-4129 Request permission
Abstract:
In this paper we characterize those functions $f$ of the real line to itself such that the nonlinear superposition operator $T_{f}$ defined by $T_{f}[ g]:= f\circ g$ maps the Hölder-Zygmund space $\mathcal {S}^s(\mathbf {R}^n)$ to itself, is continuous, and is $r$ times continuously differentiable. Our characterizations cover all cases in which $s$ is real and $s>0$, and seem to be novel when $s>0$ is an integer.References
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Additional Information
- G. Bourdaud
- Affiliation: Institut de Mathématiques de Jussieu, Équipe d’Analyse Fonctionnelle, Case 186, 4 place Jussieu, 75252 Paris Cedex 05, France
- Email: bourdaud@ccr.jussieu.fr
- Massimo Lanza de Cristoforis
- Affiliation: University of Padova, Dipartimento di Matematica Pura ed Applicata, Via Belzoni 7, 35131 Padova, Italia
- Email: mldc@math.unipd.it
- Received by editor(s): June 13, 2000
- Received by editor(s) in revised form: December 21, 2001
- Published electronically: June 4, 2002
- Additional Notes: The authors thank Jean-Pierre Kahane and Winfried Sickel for their help in the preparation of this paper. Massimo Lanza de Cristoforis wishes to thank Gérard Bourdaud and the University of Paris VII for hospitality during the months of September 1998 and of February 2000.
- © Copyright 2002 American Mathematical Society
- Journal: Trans. Amer. Math. Soc. 354 (2002), 4109-4129
- MSC (2000): Primary 46E35, 47H30
- DOI: https://doi.org/10.1090/S0002-9947-02-03000-3
- MathSciNet review: 1926867