童 玲,豆可可,林詩仲
(海南師范大學(xué) 數(shù)學(xué)與統(tǒng)計學(xué)院,海南 ???571158)
具有正負系數(shù)的一階中立型時滯微分方程的振動性
童 玲,豆可可,林詩仲
(海南師范大學(xué) 數(shù)學(xué)與統(tǒng)計學(xué)院,海南 ???571158)
建立了具有正負系數(shù)的一階中立型時滯微分方程的振動性的一個新的振動定理,它推廣了文獻中的若干結(jié)果.
振動定理;一階中立型方程;正負系數(shù)
關(guān)于一階中立型時滯微分方程的振動性,已有許多研究成果問世,例如文[1-9],在本文中,筆者繼續(xù)對一階中立型時滯微分方程的振動性進行了研究,得到了一些新的振動準則.
本文考慮帶正負系數(shù)的一階中立型微分方程:
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Oscillation of First Order Neutral Delay Differential Equations with Positive and Negative Coefficients
TONG Ling,DOU Keke,LIN Shizhong
(College of Mathematics,Hainan Normal University,Haikou571158,China)
In this paper,a new oscillation theorem for first order neutral delay differential equations with positive and negative coefficients is established,which generalizes and promotes several results in the literature.
First order neutral equation;Oscillation theorem;Positive and negative coefficients
O 175
A
1674-4942(2011)01-0015-03
2010-12-02
海南自然科學(xué)基金項目(110007)
畢和平