本文主要研究高阶微分方程周期边值问题解的存在性与多重性。

We mainly study the existence and multiplicity of solutions to high-order differential equations in this paper.

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利用锥不动点定理研究了一类二阶非线性周期边值问题正解的存在性。

A fixed point theorem in cone is used to study the existence of normal solution of second-order periodic boundary value problems.

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利用锥上的不动点指数研究了一阶非线性常微分方程组的周期边值问题。

In this paper, by using the fixed point index method, the authors discussed the periodic boundary value problem of first order differential systems.

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