Abstract

Abstract In this work, by introducing several parameters, a new kernel function including both the homogeneous and non-homogeneous cases is constructed, and a Hilbert-type inequality related to the newly constructed kernel function is established. By convention, the equivalent Hardy-type inequality is also considered. Furthermore, by introducing the partial fraction expansions of trigonometric functions, some special and interesting Hilbert-type inequalities with the constant factors represented by the higher derivatives of trigonometric functions, the Euler number and the Bernoulli number are presented at the end of the paper.

Highlights

  • Let ∥f ∥p,μ denote the norm of a measurable function f : + → + with respect to a measurable weighted function μ: + → +, that is

  • We will construct a new kernel including both the homogeneous and non-homogeneous cases, and establish a new Hilbert-type inequality which is a unified extension of inequality (1.1)–(1.9)

  • The discussions will be closed with some corollaries addressing special Hilbert-type inequalities with the constant factors associated with the higher derivatives of trigonometric functions

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Summary

Introduction

Let ∥f ∥p,μ denote the norm of a measurable function f : + → + with respect to a measurable weighted function μ: + → +, that is, p. We have some inequalities similar to inequality (1.1), such as [1] Such inequalities as inequality (1.2) are called Hilbert-type inequalities. The following inequality is a classical extension of (1.1), which was established by Yang [2] in 2004, that is,. We will establish the following Hilbert-type inequalities with the best constant factors:. We will construct a new kernel including both the homogeneous and non-homogeneous cases, and establish a new Hilbert-type inequality which is a unified extension of inequality (1.1)–(1.9). The discussions will be closed with some corollaries addressing special Hilbert-type inequalities with the constant factors associated with the higher derivatives of trigonometric functions

Definitions and lemmas
Main results
Applications

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