hal-00449195, version 1
Autour de la variance comme forme de Dirichlet : filtrations et résolution de l'identité, contractions et BMO, espérances conditionnelles et principe complet du maximum
Séminaire de Théorie du Potentiel Paris n°8 (1986) 39-53
Abstract: We examine which consequences may be drawn from the simple fact that the variance of a random variable is a Dirichlet form. We obtain a caracterisation of self-adjoint operators whose resolution of identity comes from a family of conditional expectations. This also enables us to enlighten the fact that contractions act on BMO, and to prove that positive mixtures of conditional expectations satisfy the complète maximum principle.
- 1:
- INRIA – Ecole des Ponts ParisTech
- Domain : Mathematics/Functional Analysis
Mathematics/Probability - Keywords : Dirichlet form – bounded mean oscillation – semi-group – Bochner subordination – Lévy kernel – self-adjoint operator – resolution of identity – martingale – Bernstein function – maximum principle
- hal-00449195, version 1
- http://hal.archives-ouvertes.fr/hal-00449195
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- Submitted on: Thursday, 21 January 2010 08:33:39
- Updated on: Thursday, 21 January 2010 16:00:15



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