本文利用重合度拓展定理.研究了一类p-Laplacian中立型泛函数微分方程((￠)p((x(t)-c(t)x(t-r))'))'=g(x(t-r(t)))+e(f).在C(t)变号的情况下,得到了方程周期解存在性的一个新结果.%In this paper,we study the existence of periodic solutions to a p-Laplacian neutral functional differential equation as follows((￠)p((x(t)-c(t)x(t——r))'))'=g(x(t-r(t)))+e(t).It is meaningful that c (t)is not a constant function and can change sign,which is different from the corresponding ones of known literature.
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