Recently, the monotone semiflow theory of functional differential equations has gotten great development, which has the strong attention to authors all over the world 近年來,泛函微分方程的單調(diào)半流理論獲得了極大的發(fā)展,引起了國內(nèi)外學(xué)者的關(guān)注。
The second part, chapter 4, is devoted to the existence of positive periodic solutions for neutral functional differential equations by appealing to monotone semiflow theories 本文的第二部分(第4章)就是利用這一理論,來研究一類中立型泛函微分方程正周期解的存在性