<abstract xmlns="http://www.w3.org/1999/xhtml"><p>In this paper we obtain some bounds in terms of polynomials for the function <inline-formula><alternatives><inline-graphic xmlns:xlink="http://www.w3.org/1999/xlink" xlink:href="graphic/j_gm-2020-0019_eq_001.png"></inline-graphic><math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mrow><mfrac><mrow><mo>sin</mo><mi>x</mi></mrow><mi>x</mi></mfrac></mrow></math><tex-math>{{\sin x} \over x}</tex-math></alternatives></inline-formula>, <italic>x</italic> ∈ [0, π].</p></abstract>

In this paper we obtain some bounds in terms of polynomials for the function sinxx{{\sin x} \over x}, x ∈ [0, π].

A note on Jordan’s inequality

Faculty of Sciences, Department of Mathematics and Informatics

General Mathematics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A note on Jordan’s inequality

Published Online: Dec 31, 2020

Page range: 97 - 102

Received: Sep 18, 2020

Accepted: Nov 20, 2020

DOI: https://doi.org/10.2478/gm-2020-0019

Keywords
Jordan’s inequality, Bessel functions, Schur’s conjecture, Gamma function, Poisson formula

© 2020 Emil C. Popa, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

A note on Jordan’s inequality

Published Online: Dec 31, 2020

Page range: 97 - 102

Received: Sep 18, 2020

Accepted: Nov 20, 2020

DOI: https://doi.org/10.2478/gm-2020-0019

KeywordsJordan’s inequality, Bessel functions, Schur’s conjecture, Gamma function, Poisson formula

© 2020 Emil C. Popa, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Keywords
Jordan’s inequality, Bessel functions, Schur’s conjecture, Gamma function, Poisson formula