| HAL : hal-00433274, version 4 |
| arXiv : 0911.3534 |
| Fiche détaillée | Récupérer au format |
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| Versions disponibles : | v1 (18-11-2009) | v2 (23-09-2010) | v3 (12-04-2011) | v4 (23-04-2012) |
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| Existence and asymptotic behaviour of some time-inhomogeneous diffusions |
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Mihai Gradinaru 1Yoann Offret 1 |
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| (18/11/2009) |
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| Let us consider a solution of the time-inhomogeneous stochastic differential equation driven by a Brownian motion with drift coefficient $b(t,x)=\rho\,{\rm sgn}(x)|x|^\alpha/t^\beta$. This process can be viewed as a distorted Brownian motion in a potential, possibly singular, depending on time. After obtaining results on existence and uniqueness of solution, we study its asymptotic behaviour and made a precise description, in terms of parameters $\rho,\alpha$ and $\beta$, of the recurrence, transience and convergence. More precisely, asymptotic distributions, iterated logarithm type laws and rates of transience and explosion are proved for such processes. |
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| 1 : | Institut de Recherche Mathématique de Rennes (IRMAR) |
| CNRS : UMR6625 – Université de Rennes 1 – École normale supérieure de Cachan - ENS Cachan – Institut National des Sciences Appliquées (INSA) : - RENNES – Université de Rennes II - Haute Bretagne | |
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| Processus stochastiques |
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| Domaine | : | Mathématiques/Probabilités |
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| time-inhomogeneous diffusions – singular stochastic differential equations – explosion times – scaling transformations and changes of time – recurrence and transience – iterated logarithm type laws – asymptotic distributions |
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| Liste des fichiers attachés à ce document : | ||||||||||
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| hal-00433274, version 4 | |
| http://hal.archives-ouvertes.fr/hal-00433274 | |
| oai:hal.archives-ouvertes.fr:hal-00433274 | |
| Contributeur : Mihai Gradinaru | |
| Soumis le : Lundi 23 Avril 2012, 15:07:33 | |
| Dernière modification le : Mardi 11 Septembre 2012, 12:00:15 | |