Comptes Rendus
no. 23-24
Functional Analysis
Norms of random submatrices and sparse approximation
[Normes de sous-matrices aléatoires et approximation creuse]

Présenté par : Yves Meyer

Joel A. Tropp1
1 Applied & Computational Mathematics, California Institute of Technology, Pasadena, CA 91125-5000, USA
Comptes Rendus. Mathématique, Volume 346 (2008) no. 23-24, pp. 1271-1274.

De nombreux problèmes en théorie de l'approximation non linéaire exigent des majorations la norme d'une matrice aléatoirement extraite d'une matrice donnée de plus grande dimension. L'objectif de cette Note est de présenter des estimations de ces normes qui se révèlent être importantes pour l'étude des algorithmes de minimisation de type ℓ1. La plupart de ces bornes n'ont pas encore été publiées explicitement.

Many problems in the theory of sparse approximation require bounds on operator norms of a random submatrix drawn from a fixed matrix. The purpose of this Note is to collect estimates for several different norms that are most important in the analysis of ℓ1 minimization algorithms. Several of these bounds have not appeared in detail.

Reçu le :
Accepté le :
Publié le :
DOI : 10.1016/j.crma.2008.10.008
Joel A. Tropp 1

1 Applied & Computational Mathematics, California Institute of Technology, Pasadena, CA 91125-5000, USA 
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Joel A. Tropp. Norms of random submatrices and sparse approximation. Comptes Rendus. Mathématique, Volume 346 (2008) no. 23-24, pp. 1271-1274. doi : 10.1016/j.crma.2008.10.008. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.1016/j.crma.2008.10.008/

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