Approximate controllability of fractional stochastic evolution equations

Authors:
R. Sakthivel;S. Suganya;S. M. Anthoni
Affiliations:
Department of Mathematics, Sungkyunkwan University, Suwon 440-746, South Korea;Department of Mathematics, Anna University of Technology, Coimbatore 641 047, India;Department of Mathematics, Anna University of Technology, Coimbatore 641 047, India
Venue:
Computers & Mathematics with Applications
Year:
2012

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Abstract

A class of dynamic control systems described by nonlinear fractional stochastic differential equations in Hilbert spaces is considered. Using fixed point technique, fractional calculations, stochastic analysis technique and methods adopted directly from deterministic control problems, a new set of sufficient conditions for approximate controllability of fractional stochastic differential equations is formulated and proved. In particular, we discuss the approximate controllability of nonlinear fractional stochastic control system under the assumptions that the corresponding linear system is approximately controllable. The results in this paper are generalization and continuation of the recent results on this issue. An example is provided to show the application of our result. Finally as a remark, the compactness of semigroup is not assumed and subsequently the conditions are obtained for exact controllability result.