具有正负系数的抛物中立型时滞偏微分方程解振动的充要条件

Necessary and Sufficient Conditions for Oscillation of Parabolic Neutral Delay Partial Differential Equations with Positive and Negative Coefficients

本文研究了具有正负系数的抛物中立型时滞偏微分方程的振动性,获得了该方程所有解振动的充要条件,并用例子加以说明.

This paper is concerned with the oscillation of par ab olic neutral delay partial differential equations with positive and negative coe fficients.Necessary and sufficient conditions are obtained for the oscillation o f all solutions of the equations,and these results are illustrated by some examples.