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arXiv 0903.3071math.CA
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含二、三Γ函数的均差函数完全单调的充要条件

Necessary and sufficient conditions for a function involving divided differences of the di- and tri-gamma functions to be completely monotonic

Feng Qi, Bai-Ni Guo

摘要:

本文给出了包含双伽玛函数和三Γ函数的均差的函数完全单调的充要条件。在此基础上,给出了包含两个Gamma函数之比的函数是代数完全单调的充要条件,并给出了多Γ函数的均差界的一些二重不等式.

英文摘要:

In the present paper, necessary and sufficient conditions are established for a function involving divided differences of the digamma and trigamma functions to be completely monotonic. Consequently, necessary and sufficient conditions are derived for a function involving the ratio of two gamma functions to be logarithmically completely monotonic, and some double inequalities are deduced for bounding divided differences of polygamma functions.

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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