摘要
考虑时滞差分方程xn-xn-1=F(-f(xn)+g(xn-k)),这里k是正整数,F,f,g是R→R的连续函数,F和f在R上单调增加,且对所有的u≠0,uF(u)>0.我们证明了如果对所有的y∈R,有f(y)≥g(y)(f(y)≤g(y)),则方程的每个解趋于一个常数或-∞(∞).进一步,如果对所有的y∈R,有f(y)≡g(y);则方程的每个解当n→∞时趋于常数.
Consider the retarded difference equation xn-xn-1 = F(-f(xn) +g(xn-k )),where k is a positive integer, F, f, g: R→R are continuous, F and f are increasing on R, and uF(u) > 0 for all u≠0. We show that when f(y) > g(y) (resp. f(y) < g(y)) for y ∈ R, every solution of the equation tends to either a constant or-∞ (resp. ∞) as n →∞. Furthermore, if f(y) ≡ g(y) for y ∈ R, then every solution of the equation tends to a constant as n→∞.
出处
《数学学报(中文版)》
SCIE
CSCD
北大核心
1998年第6期1215-1218,共4页
Acta Mathematica Sinica:Chinese Series
基金
国家自然科学基金!19601016
湖南省自然科学基金!97-37-42
关键词
滞后差分方程
渐近性
解
差分方程
Retarded difference equation, Asymptotic behavior