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Prevalenee of multifractal functions in S-nu spaces Aubry, Jean-Marie ; Bastin, Françoise ; in Journal of Fourier Analysis and Applications (2007), 13(2), 175-185 Spaces called S-v were introduced by Jaffard [16] as spaces of functions characterized by the number similar or equal to 2(v(alpha)j) of their wavelet coefficients having a size greater than or similar to ... [more ▼] Spaces called S-v were introduced by Jaffard [16] as spaces of functions characterized by the number similar or equal to 2(v(alpha)j) of their wavelet coefficients having a size greater than or similar to 2(-alpha j) at scale j. They are Polish vector spaces for a natural distance. In those spaces we show that multifractal functions are prevalent (an infinite-dimensional "almost-every"). Their spectrum of singularities can be computed from v, which justifies a new multifractal formalism, not limited to concave spectra. [less ▲] Detailed reference viewed: 57 (27 ULg)The S\nu spaces: new spaces defined with wavelet coefficients and related to multifractal analysis Aubry, Jean-Marie ; Bastin, Françoise ; et al in International Journal of Applied Mathematics & Statistics (2007), 7(Fe07), 82-95 In the context of multifractal analysis, more precisely in the context of the study of H\"older regularity, Stéphane Jaffard introduced new spaces of functions related to the distributionof wavelet ... [more ▼] In the context of multifractal analysis, more precisely in the context of the study of H\"older regularity, Stéphane Jaffard introduced new spaces of functions related to the distributionof wavelet coefficients, the ${\cal S}^{\nu}$ spaces. From a functional analysis point of view, one can define the corresponding sequence spaces, endow them with natural topologies and study their properties. The results lead to construct probability Borel measures with applications in the context of multifractal analysis. [less ▲] Detailed reference viewed: 122 (32 ULg)Topological properties of the sequence spaces S-nu Aubry, Jean-Marie ; Bastin, Françoise ; et al in Journal of Mathematical Analysis and Applications (2006), 321(1), 364-387 We define sequence spaces based on the distributions of the wavelet coefficients in the spirit of [S. Jaffard, Beyond Besov spaces, part I: Distributions of wavelet coefficients, J. Fourier Anal. Appl. 10 ... [more ▼] We define sequence spaces based on the distributions of the wavelet coefficients in the spirit of [S. Jaffard, Beyond Besov spaces, part I: Distributions of wavelet coefficients, J. Fourier Anal. Appl. 10 (2004) 221-246]. We study their topology and especially show that they can be endowed with a (unique) complete metric for which compact sets can be explicitly described and we study properties of this metric. We also give relationships with Besov spaces. (c) 2005 Elsevier Inc. All rights reserved. [less ▲] Detailed reference viewed: 77 (36 ULg) |
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