2020/05/23 by Ludovic Goudenège, Goudenège, Ludovic, Luigi Manca +1
Computer Science · Economics, Econometrics and Finance · Engineering · Mathematics · Physics and Astronomy · #35Q30 #35Q35 #37L55 #60H15 #60H30 #76D05 #FOS: Mathematics #FOS: Physical sciences #Image and Signal Denoising Methods #Mathematical Physics (math-ph) #Probability (math.PR) #Stability and Controllability of Differential Equations #Stochastic processes and financial applications #math-ph #math.MP #math.PR #msc:35Q30 #msc:35Q35 #msc:37L55 #msc:60H15 #msc:60H30 #msc:76D05
paper · pdf · doi:10.48550/arxiv.2005.11482
arxiv created 2020/05/23 · openalex publication_date 2020/05/23 · arxiv updated 2020/05/26 · openalex created_date 2022/08/29 · openalex updated_date 2026/07/28
We consider a stochastic perturbation of the α-Navier-Stokes model. The stochastic perturbation is an additive space-time noise of trace class. Under a natural condition about the trace of operator Q in front of the noise, we prove the existence and uniqueness of strong solution, continuous in time in classical spaces of L2 functions with estimates of non-linear terms. It is based on a priori estimate of solutions of finite-dimensional systems, and tightness of the approximated solution. Moreover, by studying the derivative of the solution with respect to the initial data, we can prove exponential moment of the approximated solutions, which is enough to obtain Strong Feller property and irreducibility of the transition semigroup. This leads naturally to the existence and uniqueness of an invariant measure.