TAILIEUCHUNG - Báo cáo hóa học: " Attracting and quasi-invariant sets for a class of impulsive stochastic difference equations"

Attracting and quasi-invariant sets for a class of impulsive stochastic difference equations | Li and Long Advances in Difference Equations 2011 2011 3 http content 2011 1 3 o Advances in Difference Equations a SpringerOpen Journal RESEARCH Open Access Attracting and quasi-invariant sets for a class of impulsive stochastic difference equations Dingshi Li and Shujun Long Correspondence lidingshi2006@ Yangtze Center of Mathematics Sichuan University Chengdu 610064 China SpringerOpen0 Abstract The aim of this article is to study the attracting and quasi-invariant sets for a class of impulsive stochastic difference equations. By establishing a difference inequality we obtain the attracting and quasi-invariant sets of systems under consideration. An example is given to illustrate the theory. Keywords Attracting set Quasi-invariant set Impulsive Stochastic Difference equations Difference in-equality Halanay inequality Introduction Difference equations usually appear in the investigation of systems with discrete time or in the numerical solution of systems with continuous time 1 . A lot of difference systems have variable structures subject to stochastic abrupt changes which may result from abrupt phenomena such as stochastic failures and repairs of the components changes in the interconnections of subsystems sudden environment changes etc. In recent years the stability investigation of stochastic difference equations has been interesting to many investigators and various advanced results on this problem have been reported 2-5 . However besides the stochastic effect an impulsive effect likewise exists in a wide variety of evolutionary processes in which states are changed abruptly at certain moments of time involving such fields as medicine and biology economics mechanics electronics and telecommunications. Recently the asymptotic behaviors of impulsive difference equations have attracted considerable attention. Many interesting results on impulsive effect have been obtained 6-8 . In 9 some stability conditions on .

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