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J. Zabczyk (1999)
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Y. Kabanov, S. Pergamenshchikov (2002)
Two-scale stochastic systems
H. Kushner (1990)
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G. Prato, J. Zabczyk (1996)
Ergodicity for Infinite Dimensional Systems: Invariant measures for stochastic evolution equations
The present paper studies the problem of singular perturbation in the infinite-dimensional framework and gives a Hilbert-space-valued stochastic version of the Tikhonov theorem. We consider a nonlinear system of Hilbert-space-valued equations for a "slow" and a "fast" variable; the system is strongly coupled and driven by linear unbounded operators generating a C 0 -semigroup and independent cylindrical Brownian motions. Under well-established assumptions to guarantee the existence and uniqueness of mild solutions, we deduce the required stability of the system from a dissipativity condition on the drift of the fast variable. We avoid differentiability assumptions on the coefficients which would be unnatural in the infinite-dimensional framework.
Applied Mathematics and Optimization – Springer Journals
Published: Mar 1, 2006
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