with positive coefficient p is considered. Sufficient conditions with respect to p are formulated in order to guarantee the existence of positive solutions if k→∞. As a tool of the proof of corresponding result, the method described in the author's previous papers is used. Except for the fact of the existence of positive solutions, their upper estimation is given. The analysis shows that every positive solution of the indicated family of positive solutions tends to zero (if k→∞) with the speednot smaller than the speed characterized by the function k·(n/(n+1))k. A comparison with the known results is given and some open questions are discussed.">
下属音离散方程的正解Δu (k + n) =−p (k) u (k) - raybet雷竞app,雷竞技官网下载,雷电竞下载苹果
延迟离散方程
Δ
u
(
k
+
n
)
=
−
p
(
k
)
u
(
k
)积极的系数
p被认为是。对充分条件
p制定为了保证正解的存在如果吗
k
→
∞。作为一种工具的相应结果,证明作者以前的论文中描述的方法。除了事实正解的存在,他们上估计。分析表明,表示家庭的每一个正解趋于零(如果积极的解决方案
k
→
∞)speednot小于速度函数的特征
k
·
(
n
/
(
n
+
1
)
)
k。比较与已知的结果给出一些开放式问题进行了讨论。