Euler semigroup, Hardy-Sobolev and Gagliardo-Nirenberg type inequalities on homogeneous groups

In this paper we describe the Euler semigroup $\{e^{-t{\mathbb{E}}^{\ast }\mathbb{E}}{\}}_{t>0}$ on homogeneous Lie groups, which allows us to obtain various types of the Hardy-Sobolev and Gagliardo-Nirenberg type inequalities for the Euler operator $\mathbb{E}$. Moreover, the sharp remainder terms of the Sobolev type inequality, maximal Hardy inequality and $\mathrm{\mid }\cdot \mathrm{\mid }$-radial weighted Hardy-Sobolev type inequality are established.