We prove the uniqueness theorems of solutions for the strictly monotone operators.

并进一步证明了严格单调算子的解的唯一性定理。

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Some existence and uniqueness theorems for above problem are established by using certain fixed point theorem based on the degree theory.

用基于度理论的不动点定理，建立了一系列存在唯一性定理。

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In this paper we discussed the existence and uniqueness theorems for third-order boundary value problems, using the method of upper and lower solutions.

本文利用上、下解方法证明了两类三阶边值问题解的存在性和唯一性。

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