摘要
研究了差分方程x(n+1)=xnern(1-axn-k-bx2n-k),n=0,1,…,其中{rn}是非负实数列,a>0,b>0:k是非负整数.证明了:(1)设 则(*)的每一正解满足limxn=N*.(2)方程x(n+1)=xn·e~r(1-ax_(n-k)-bx~2_(n-k),n+0,1…的每一正解Xn满足limxn=N*的充分必要条件是r(1十bN*~2)≤2.
The difference equation xn+1 = ) is examined, where {rn } is asequence of nonnegative numbers, a > 0, b > 0 and k is a nonnegative integer. It isproved that if ,and lim sup then everypositive solution of the difference, eqnation converges to N* as n
出处
《宁波大学学报(理工版)》
CAS
1999年第3期20-28,共9页
Journal of Ningbo University:Natural Science and Engineering Edition
关键词
差分方程
全局渐近性
正解
非线性
充要条件
difference equation
globally asy mptotic properly
positive solution