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Elegant proofs for properties of normalized remainders of Maclaurin power series expansion of exponential function

  • Yue-Wu Li and Feng Qi EMAIL logo
Published/Copyright: October 24, 2025
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Abstract

In the paper, by establishing an integral representation of a specific Maclaurin power series and in light of two monotonicity rules, the authors present very elegant proofs for several basic properties, including the positivity, (absolute) monotonicity, logarithmic convexity, and inequalities, of the normalized remainders of the Maclaurin power series expansion of the exponential function.

Funding statement: This work was partially supported by the Youth Project of Hulunbuir City for Basic Research and Applied Basic Research (Grant No. GH2024020) and by the Natural Science Foundation of Inner Mongolia Autonomous Region of China (Grant No. 2025QN01041).

Acknowledgement

The authors appreciate anonymous referees for their careful corrections and valuable comments on the original version of this paper.

  1. (Communicated by Tomasz Natkaniec)

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Received: 2025-04-02
Accepted: 2025-05-30
Published Online: 2025-10-24
Published in Print: 2025-10-27

© 2025 Mathematical Institute Slovak Academy of Sciences

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