The minimum modulus principle is proved by using the preserving field theorem, and the span of minimum modulus point is discussed.

从复变函数理论出发，利用辐角原理、最大模原理、最小模原理给出代数学基本定理的几种新的证明方法。

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Maximum modulus principle plays an important role in the complex analytics, and it is a powerful tool in studying the analytic function.

摘要最大模原理在复变函数论中占有重要的地位，是研究解析函数的有力工具。

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This paper uses several methods of complex functions theorey to prove fundamental theorem of algebra by argument principle, maximum modulus principle and minimum modulus principle.

从复变函数理论出发，利用辐角原理、最大模原理、最小模原理给出代数学基本定理的几种新的证明方法。

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