Nous considérons une équation différentielle stochastique retardée à dérive exponentiellement stable et conduite par un processus de Lévy général. Le coefficient de la diffusion est seulement supposé satisfaire une condition lipschitzienne locale et être borné. En supposant une condition additionnelle faible sur les grands sauts du processus de Lévy, nous démontrons l'existence d'une mesure invariante. Les principaux ingrédients de la preuve sont une formule pour les variations des constantes et un théorème de stabilité par rapport aux perturbations des conditions initiales, qui sont d'un intérêt indépendant.
We consider a stochastic delay differential equation with exponentially stable drift and diffusion driven by a general Lévy process. The diffusion coefficient is assumed to be locally Lipschitz and bounded. Under a mild condition on the large jumps of the Lévy process, we show existence of an invariant measure. Main tools in our proof are a variation-of-constants formula and a stability theorem in our context, which are of independent interest.
Mots-clés : Delay equation, invariant measure, Lévy process, semimartingale, Skorohod space, stability, tightness, variation-of-constants formula
@article{AIHPB_2011__47_4_1121_0, author = {Stojkovic, I. and van Gaans, O.}, title = {Invariant measures and a stability theorem for locally {Lipschitz} stochastic delay equations}, journal = {Annales de l'I.H.P. Probabilit\'es et statistiques}, pages = {1121--1146}, publisher = {Gauthier-Villars}, volume = {47}, number = {4}, year = {2011}, doi = {10.1214/10-AIHP396}, zbl = {1278.34093}, mrnumber = {2884227}, language = {en}, url = {http://www.numdam.org/articles/10.1214/10-AIHP396/} }
TY - JOUR AU - Stojkovic, I. AU - van Gaans, O. TI - Invariant measures and a stability theorem for locally Lipschitz stochastic delay equations JO - Annales de l'I.H.P. Probabilités et statistiques PY - 2011 SP - 1121 EP - 1146 VL - 47 IS - 4 PB - Gauthier-Villars UR - http://www.numdam.org/articles/10.1214/10-AIHP396/ DO - 10.1214/10-AIHP396 LA - en ID - AIHPB_2011__47_4_1121_0 ER -
%0 Journal Article %A Stojkovic, I. %A van Gaans, O. %T Invariant measures and a stability theorem for locally Lipschitz stochastic delay equations %J Annales de l'I.H.P. Probabilités et statistiques %D 2011 %P 1121-1146 %V 47 %N 4 %I Gauthier-Villars %U http://www.numdam.org/articles/10.1214/10-AIHP396/ %R 10.1214/10-AIHP396 %G en %F AIHPB_2011__47_4_1121_0
Stojkovic, I.; van Gaans, O. Invariant measures and a stability theorem for locally Lipschitz stochastic delay equations. Annales de l'I.H.P. Probabilités et statistiques, Tome 47 (2011) no. 4, pp. 1121-1146. doi : 10.1214/10-AIHP396. http://www.numdam.org/articles/10.1214/10-AIHP396/
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