By using a well-known fixed point index theorem, we obtain the existence, multiplicity and nonexistence of positive periodic solution(s) to this equation.

利用一个著名的不动点指标定理，获得了该方程周期正解的存在性、多重性和不存在性。

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This paper discusses the existence of multiple positive solutions of a class of nonlinear singular boundary value problems by means of the fixed point index Theorem on cones.

利用锥映射的不动点指数定理，研究了一类非线性奇异边值问题多个正解的存在性问题。

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In this paper, we consider the existence of multiple positive solutions of discrete boundary value problem. The theory of fixed point index is used here to derive the existence theorem.

本文利用不动点指数理论得到离散边值问题多重正解的存在性。

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