2 problems

Let $G$ be a Métivier group with sub-Laplacian $\mathcal{L}$, and let $S_*^{\alpha}(\mathcal{L})$ denote the maximal Bochner–Riesz operator associated with $\mathcal{L}$. Write…

Let $G$ be an H-type group, let $N$ be the Kaplan norm on $G$, and for $\beta>0$ define the weight $w_\beta=e^{-N^\beta}$. Let $\mathcal{L}^{w_\beta}$ be the weighted sub-Laplacian…