一阶时滞微分方程正周期解的存在性

2014-10-09刘瑞宽

四川师范大学学报（自然科学版） 2014年5期

关键词：甘肃兰州西北师范大学李刚

张露, 刘瑞宽

(西北师范大学数学与统计学院,甘肃兰州730070)

1 主要结果

2 预备知识

3 主要结果的证明

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