Supported by the National Natural Sciences Foundation of China(10361006);Supported by the Natural Sciences Foundation of Yunnan Province(2003A0001M);Supported by the Jiangsu "Qing-lanProject" for Excellent Young Teachers in University(2006)
By using a fixed point theorem on a cone to investigate the existence of two positive periodic solutions for the following delay difference system with feedback control argument of the form {△x(n)=-b(n)x(n)+f...
This work was supported by the National Natural Sciences Foundation of China (10361006);the Natural Sciences Foundation of Yunnan Province (2003A0001M).
By using Gaines and Mawhin’s continuation theorem of coincidence degree theory and constructing Lyapunov functionals,a set of easily verifiable sufficient conditions are derived for the existence and global attractiv...