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From Eckart and Young approximation to Moreau envelopes andvice versa

Published online by Cambridge University Press:  26 August 2013

Jean-Baptiste Hiriart-Urruty  and
Hai Yen Le
Jean-Baptiste Hiriart-Urruty
Affiliation:
Institute of Mathematics, Paul Sabatier University, 118 Route de Narbonne, 31400 Toulouse, France.. jbhu@math.univ-toulouse.fr; hyle@math.univ-toulouse.fr ; http://www.math.univ-toulouse.fr/˜jbhu/
Hai Yen Le
Affiliation:
Institute of Mathematics, Paul Sabatier University, 118 Route de Narbonne, 31400 Toulouse, France.. jbhu@math.univ-toulouse.fr; hyle@math.univ-toulouse.fr ; http://www.math.univ-toulouse.fr/˜jbhu/
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Abstract

In matricial analysis, the theorem of Eckart and Young provides a best approximation ofan arbitrary matrix by a matrix of rank at most r. In variationalanalysis or optimization, the Moreau envelopes are appropriate ways of approximating orregularizing the rank function. We prove here that we can go forwards and backwardsbetween the two procedures, thereby showing that they carry essentially the sameinformation.

Keywords

Eckart and Young theoremmoreau envelopesrank minimization problems
Type
Research Article
Information
RAIRO - Operations Research , Volume 47 , Issue 3 , July 2013 , pp. 299 - 310
Copyright
© EDP Sciences, ROADEF, SMAI, 2013

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