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Proceedings of the American Mathematical Society
Proceedings of the American Mathematical Society
ISSN 1088-6826(online) ISSN 0002-9939(print)


Weierstrass functions in Zygmund's class

Author: Yanick Heurteaux
Journal: Proc. Amer. Math. Soc. 133 (2005), 2711-2720
MSC (2000): Primary 26A27, 28A80
Published electronically: March 22, 2005
MathSciNet review: 2146218
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Abstract: Consider the function


where $b>1$ and $g$ is an almost periodic $C^{1,\varepsilon}$ function. It is well known that the function $f$ lives in the so-called Zygmund class. We prove that $f$ is generically nowhere differentiable. This is the case in particular if the elementary condition $g^\prime(0)\not= 0$ is satisfied. We also give a sufficient condition on the Fourier coefficients of $g$ which ensures that $f $is nowhere differentiable.

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Additional Information

Yanick Heurteaux
Affiliation: Laboratoire de Mathématiques, UMR 6620, Université Blaise Pascal, F-63177 Aubière cedex, France

PII: S 0002-9939(05)07857-3
Keywords: Weierstrass functions, almost periodic functions, second-order oscillations, Zygmund class
Received by editor(s): April 29, 2004
Published electronically: March 22, 2005
Communicated by: David Preiss
Article copyright: © Copyright 2005 American Mathematical Society

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