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arXiv 1702.03458math.CV
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解析函数的Macdonald定理

Macdonald's Theorem for Analytic Functions

R. C. McPhedran

摘要:

对H. M.关于解析函数导数零点的一个定理重新给出了证明。M.麦克唐纳,这似乎是现在鲜为人知。该定理指出,如果一个函数$f(z)$在一个有界区域内是解析的,该有界区域由一个轮廓限定,在该轮廓上$f(z)$的模是常数,则$f(z)$及其导数在该区域内的零点数(根据重数计算)相差1。

英文摘要:

A proof is reconstructed for a useful theorem on the zeros of derivatives of analytic functions due to H. M. Macdonald, which appears to be now little known. The Theorem states that, if a function $f(z)$ is analytic inside a bounded region bounded by a contour on which the modulus of $f(z)$ is constant, then the number of zeros (counted according to multiplicity) of $f(z)$ and of its derivative in the region differ by unity.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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