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2011, 2011(Special): 79-90. doi: 10.3934/proc.2011.2011.79

## Characterisation of the asymptotic behaviour of scalar linear differential equations with respect to a fading stochastic perturbation

 1 Edgeworth Centre for Financial Mathematics, School of Mathematical Sciences, Dublin City University, Glasnevin, Dublin 9, Ireland, Ireland 2 The University of the West Indies, Mona Campus, Department of Mathematics, Mona, Kingston 7, Jamaica

Received  July 2010 Revised  April 2011 Published  October 2011

In this paper, we characterise the global stability, boundedness, and unboundedness of solutions of a scalar linear stochastic di erential equation, where the di usion coecient is independent of the state. The di erential equation is a perturbed version of a linear deterministic equation with a globally stable equilibrium at zero. We give conditions on the rate of decay of the noise intensity under which all solutions either tend to the equilibrium, are bounded but tend to zero with probability zero, or are unbounded on the real line. We also show that no other types of asymptotic behaviour are possible.
Citation: John A. D. Appleby, Jian Cheng, Alexandra Rodkina. Characterisation of the asymptotic behaviour of scalar linear differential equations with respect to a fading stochastic perturbation. Conference Publications, 2011, 2011 (Special) : 79-90. doi: 10.3934/proc.2011.2011.79
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