The Trudinger type inequality in fractional boundary Hardy inequality

TL;DR

This paper proves a fractional boundary Hardy inequality with a Trudinger-type inequality involving a singular weight, extending classical results to fractional Sobolev spaces on Lipschitz domains.

Contribution

It establishes a fractional version of the Trudinger inequality incorporating a boundary distance function and addresses the delicate case when $sp=1$ with a logarithmic correction.

Findings

Proved fractional boundary Hardy inequality with Trudinger-type embedding.

Extended classical inequalities to fractional Sobolev spaces on Lipschitz domains.

Addressed the critical case $sp=1$ with a logarithmic correction.

Abstract

We establish Trudinger-type inequality in the context of fractional boundary Hardy-type inequality for the case $sp=d$, where $p>1, ~ s \in (0,1)$ on a bounded Lipschitz domain $\Omega \subset \mathbb{R}^d$. In particular, we establish fractional version of Trudinger-type inequality with an extra singular function, namely $d$-th power of the distance function from $\partial \Omega$ in the denominator of the integrand. The case $d=1$, as it falls in the category $sp=1$, becomes more delicate where an extra logarithmic correction is required together with subtraction of an average term.