Continuous dependence on the coefficients and global existence for stochastic reaction diffusion equations

Details Continuous dependence on the coefficients and global existence for stochastic reaction diffusion equations Continuous dependence on the coefficients and global existence for stochastic reaction diffusion equations

2011-04-21

arxiv.org/abs/1104.4258v2

Mathematics

Probability

Revisions based upon the referee's report

Scientific paper

We prove convergence of the solutions X_n of semilinear stochastic evolution equations dX_n(t) = (A_nX(t) + F_n(t,X_n(t)))dt + G_n(t,X_n(t))dW_H(t), X_n(0) = x_n, on a Banach space B, driven by a cylindrical Brownian motion W_H in a Hilbert space H. We assume that the operators A_n converge to A and the locally Lipschitz functions F_n and G_n converge to the locally Lipschitz functions F and G in an appropriate sense. Moreover, we obtain estimates for the lifetime of the solution X of the limiting problem in terms of the lifetimes of the approximating solutions X_n. We apply the results to prove global existence for reaction diffusion equations with multiplicative noise and a polynomially bounded reaction term satisfying suitable dissipativity conditions. The operator governing the linear part of the equation can be an arbitrary uniformly elliptic second order elliptic operator.

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