The weak-type $(1,1)$ estimates for wave equation on $ax+b$ groups

Yunxiang Wang, Lixin Yan

Let $G$ be the group ${\mathbb{R}}_{+}⋉{\mathbb{R}}^n$ endowed with Riemannian symmetric space metric $d$ and the right Haar measure $\mathrm{d}\rho$ which is of $ax+b$ type, and $L…