Oscillation of First Order Nonlinear Neutral Differential Equations with "Integrally Small” Coefficients
Key Words: Neutral differential equation   'Integrally small' coefficients Oscillation.  
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Author NameAffiliation
DAI Bin-xiang Dept. of Appl. Math.
Hunan Univ.
Changsha 410082 
QIAN Xiang-zheng Dept. of Appl. Math.
Hunan Univ.
Changsha 410082 
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      Using some technique, we obtain several new sufficient conditions for the oscillation of all solutions of the neutral equation differential [x(t)-P(t)x(t-r)]′+(?) signx(t -δi)=0. Our results extend and improve some of the known results in the literature.
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