Research Article

Increasing property and logarithmic convexity concerning Dirichlet beta function, Euler numbers, and their ratios

Volume: 52 Number: 1 February 15, 2023
EN

Increasing property and logarithmic convexity concerning Dirichlet beta function, Euler numbers, and their ratios

Abstract

In the paper, by virtue of an integral representation of the Dirichlet beta function, with the aid of a relation between the Dirichlet beta function and the Euler numbers, and by means of a monotonicity rule for the ratio of two definite integrals with a parameter, the author finds increasing property and logarithmic convexity of two functions and two sequences involving the Dirichlet beta function, the Euler numbers, and their ratios.

Keywords

References

  1. [1] M. Abramowitz and I. A. Stegun (Eds), Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables, National Bureau of Standards, Applied Mathematics Series 55, 10th printing, Washington, 1972.
  2. [2] J. A. Adell and A. Lekuona, Dirichlet’s eta and beta functions: concavity and fast computation of their derivatives, J. Number Theory 157, 215–222, 2015.
  3. [3] J. M. Borwein, D. H. Bailey, and R. Girgensohn, Experimentation in Mathematics: Computational Paths to Discovery, A K Peters, Ltd., Natick, MA, 2004.
  4. [4] B.-N. Guo and F. Qi, Increasing property and logarithmic convexity of functions involving Riemann zeta function, https://arxiv.org/abs/2201.06970, 2022.
  5. [5] Kh. Hessami Pilehrood and T. Hessami Pilehrood, Series acceleration formulas for beta values, Discrete Math. Theor. Comput. Sci. 12 (2), 223–236, 2010.
  6. [6] D. Lim and F. Qi, Increasing property and logarithmic convexity of two functions involving Dirichlet eta function, J. Math. Inequal. 16 (2), 463–469, 2022.
  7. [7] F. Qi, Notes on a double inequality for ratios of any two neighbouring non-zero Bernoulli numbers, Turkish J. Anal. Number Theory 6 (5), 129–131, 2018.
  8. [8] F. Qi, A double inequality for the ratio of two non-zero neighbouring Bernoulli numbers, J. Comput. Appl. Math. 351, 1–5, 2019.

Details

Primary Language

English

Subjects

Mathematical Sciences

Journal Section

Research Article

Publication Date

February 15, 2023

Submission Date

April 6, 2022

Acceptance Date

July 6, 2022

Published in Issue

Year 2023 Volume: 52 Number: 1

APA
Qi, F., & Yao, Y.- hong. (2023). Increasing property and logarithmic convexity concerning Dirichlet beta function, Euler numbers, and their ratios. Hacettepe Journal of Mathematics and Statistics, 52(1), 17-22. https://doi.org/10.15672/hujms.1099250
AMA
1.Qi F, Yao Y hong. Increasing property and logarithmic convexity concerning Dirichlet beta function, Euler numbers, and their ratios. Hacettepe Journal of Mathematics and Statistics. 2023;52(1):17-22. doi:10.15672/hujms.1099250
Chicago
Qi, Feng, and Yong-hong Yao. 2023. “Increasing Property and Logarithmic Convexity Concerning Dirichlet Beta Function, Euler Numbers, and Their Ratios”. Hacettepe Journal of Mathematics and Statistics 52 (1): 17-22. https://doi.org/10.15672/hujms.1099250.
EndNote
Qi F, Yao Y- hong (February 1, 2023) Increasing property and logarithmic convexity concerning Dirichlet beta function, Euler numbers, and their ratios. Hacettepe Journal of Mathematics and Statistics 52 1 17–22.
IEEE
[1]F. Qi and Y.- hong Yao, “Increasing property and logarithmic convexity concerning Dirichlet beta function, Euler numbers, and their ratios”, Hacettepe Journal of Mathematics and Statistics, vol. 52, no. 1, pp. 17–22, Feb. 2023, doi: 10.15672/hujms.1099250.
ISNAD
Qi, Feng - Yao, Yong-hong. “Increasing Property and Logarithmic Convexity Concerning Dirichlet Beta Function, Euler Numbers, and Their Ratios”. Hacettepe Journal of Mathematics and Statistics 52/1 (February 1, 2023): 17-22. https://doi.org/10.15672/hujms.1099250.
JAMA
1.Qi F, Yao Y- hong. Increasing property and logarithmic convexity concerning Dirichlet beta function, Euler numbers, and their ratios. Hacettepe Journal of Mathematics and Statistics. 2023;52:17–22.
MLA
Qi, Feng, and Yong-hong Yao. “Increasing Property and Logarithmic Convexity Concerning Dirichlet Beta Function, Euler Numbers, and Their Ratios”. Hacettepe Journal of Mathematics and Statistics, vol. 52, no. 1, Feb. 2023, pp. 17-22, doi:10.15672/hujms.1099250.
Vancouver
1.Feng Qi, Yong-hong Yao. Increasing property and logarithmic convexity concerning Dirichlet beta function, Euler numbers, and their ratios. Hacettepe Journal of Mathematics and Statistics. 2023 Feb. 1;52(1):17-22. doi:10.15672/hujms.1099250

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