A class of two-sided inequalities involving the psi and polygamma functions

作者：Chen, Chao-Ping; Srivastava, H. M.^*

来源：Integral Transforms and Special Functions, 2010, 21(7): 523-528.

DOI：10.1080/10652460903403596

• gamma function
• psi function
• polygamma functions
• Riemann zeta function
• two-sided inequalities
• Hurwitz (or generalized) zeta function
• weighted arithmetic-geometric inequality
• Euler-Mascheroni constant

A class of two-sided inequalities involving the psi and polygamma functions is presented. These inequalities provide new bounds for the psi function in terms of the polygamma functions.

• 出版日期2010
• 单位河南理工大学