Some notes on endpoint estimates for pseudo-differential operators

Jingwei Guo, Xiangrong Zhu

We study the pseudo-differential operator \begin{equation*} T_a f\left(x\right)=\int_{\mathbb{R}^n}e^{ix\cdotξ}a\left(x,ξ\right)\widehat{f}\left(ξ\right)\,\textrm{d}ξ, \end{equatio…