一階時滯微分方程正周期解的存在性

張 露, 劉瑞寬

(西北師范大學數(shù)學與統(tǒng)計學院,甘肅蘭州730070)

1 主要結(jié)果

2 預備知識

3 主要結(jié)果的證明

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