Author

Ji Li

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Preprint Oct 2026

A geometry-independent endpoint estimate for the Littlewood--Paley $g$-function generated by the Poisson semigroup

We prove a weak $(1,1)$ estimate for the full Poisson Littlewood--Paley $g$-function on every complete Riemannian manifold without boundary, with an explicit universal constant approximately equal to $3.33606$. The estimate requires no curvature restriction, volume doubling, heat kernel bound, or stochastic completenes...

Bo Li, Ji Li, Jin-Xia Li · 0 citations

Preprint Sep 2026

Non-radial Dunkl multipliers at the $L^2$-Sobolev threshold

We prove a H\"ormander multiplier theorem for the Dunkl transform associated with an arbitrary finite reflection group. Uniform $H^\sigma(\mathbb{R}^N)$ bounds for the normalised dyadic pieces of a measurable symbol, with $\sigma>\mathbf N/2$ and $\mathbf N$ the homogeneous dimension, imply $L^p(d\omega)$ boundedness f...

Der-Chen Chang, Ji Li, Chao-Jie Wen et al. · 2 citations · ⚡1

Preprint Aug 2026

A Fefferman--Stein inequality for the Dunkl Poisson semigroup and its chamber-lifted formulation

We prove a Fefferman--Stein good-$\lambda$ inequality for the Dunkl Poisson semigroup associated with a finite reflection group and a non-negative multiplicity function. For arbitrary complex-valued $f\in C_c^\infty(\mathbb R^N)$, with no $G$-invariance assumption, it compares the orbit-conical non-tangential maximal f...

Yuying Chen, Yan-Chang Han, Yong-Sheng Han et al. · 0 citations