hal-00695326, version 1
Risk estimation for matrix recovery with spectral regularization
(07/05/2012)
- 1 :
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http://www.ceremade.dauphine.fr/index.html
CNRS : UMR7534 – Université Paris IX - Paris Dauphine Place du Maréchal de Lattre de Tassigny 75775 - Paris Cedex 16 France - 2 :
-
http://www.greyc.fr
CNRS : UMR6072 – Université de Caen Basse-Normandie – Ecole Nationale Supérieure d'Ingénieurs de Caen Boulevard du Maréchal Juin - 14050 CAEN Cedex France - 3 :
-
http://www.math.u-bordeaux.fr/IMB/
CNRS : UMR5251 – Université Sciences et Technologies - Bordeaux I – Université Victor Segalen - Bordeaux II 351 cours de la Libération 33405 TALENCE CEDEX France
Références bibliographiques
- Type de publication : Documents sans référence de publication (Preprint)
- Domaine :
- Titre : Risk estimation for matrix recovery with spectral regularization
- Résumé : In this paper, we develop an approach to recursively estimate the quadratic risk for matrix recovery problems regularized with spectral functions. Toward this end, in the spirit of the SURE theory, a key step is to compute the (weak) derivative and divergence of a solution with respect to the observations. As such a solution is not available in closed form, but rather through a proximal splitting algorithm, we propose to recursively compute the divergence from the sequence of iterates. A second challenge that we unlocked is the computation of the (weak) derivative of the proximity operator of a spectral function. To show the potential applicability of our approach, we exemplify it on a matrix completion problem to objectively and automatically select the regularization parameter.
- Langue du texte
intégral : Anglais - Date de production,
écriture : 07/05/2012 - Mots Clés : Risk estimation – SURE – matrix recovery – matrix completion – matrix-valued function – spectral regularization – nuclear norm – proximal algorithms
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- hal-00695326, version 1
- http://hal.archives-ouvertes.fr/hal-00695326
- oai:hal.archives-ouvertes.fr:hal-00695326
- Contributeur :
- Soumis le : Lundi 7 Mai 2012, 18:03:57
- Dernière modification le : Lundi 7 Mai 2012, 20:55:11









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