摘要
研究一阶中立型微分方程分别给出了保证这类方程存在正解和不存在正解的一些充分条件，推广和改进了已有的结果。
The authors consider the first order neutral differential equations where and r, t,Sufficient conditions for the existence and nonexistence of positive solutions are obtained respectively which generate and improve some other results.
出处
《黑龙江大学自然科学学报》
CAS
1997年第2期8-11,14,共5页
Journal of Natural Science of Heilongjiang University
