OSCILLATION CRITERIA OF SOLUTIONS FOR A CLASS OF DELAY DIFFERENTIAL EQUATIONS WITH POSITIVE AND NEGATIVE COEFFICIENTS

• 作者: 关开中 廖基定 王奇生
• 来源期刊: 微分方程年刊：英文版
• 学科: 数学
• 关键词: 微分算子 迟滞 充分条件 系数
• 年，卷（期）: 2004,（3）
• 页码范围: 235-242
• 页数: 8页
• 分类号: O175.3

摘要

Some sufficient conditions for the oscillation of all solutions of the delay differential equations with positive and negative coefficients x′(t)+1/t∑i=1^npix(αit)-1/5∑i=1^nqix(βit)=1,t≥t0>0 are obtained, where 0 < αi,βi <1, Pi >01 qi≥0, are constants, i = 1,2,...,n.