Ziwei Li

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20222026

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3 papers · 1 filter

math.FA2026

A Novel Two-Parameter Penalty: Relaxation Degree Analysis and Sparse Signal Recovery

Ziwei Li, Wengu Chen, Huanmin Ge +1

In this article, we introduce a nonconvex two-parameter penalty function $P_{a, p}$ , parameterized by $a \in (0, \infty)$ and $p \in (0, 1]$ , and the relaxation degree RD $_{P}$ for a separa…

math.FA2026

Matrix-Weighted Poincaré-Type Inequalities with Applications to Logarithmic Hajłasz--Besov Spaces on Spaces of Homogeneous Type

Ziwei Li, Dachun Yang, Wen Yuan

Let $X$ be a space of homogeneous type. In this article, based on the reducing operators of matrix $A_{p}$ -weights, the authors introduce the vector-valued Hajłasz gradi…

math.FA2022

Pointwise Multipliers for Besov Spaces $B_{p, \infty}^{0, b} (R^{n})$ with Only Logarithmic Smoothness

Ziwei Li, Winfried Sickel, Dachun Yang +1

In this article, we establish a characterization of the set $M (B_{p, \infty}^{0, b} (R^{n}))$ of all pointwise multipliers of Besov spaces $B_{p, \infty}^{0, b} (R^{n})$ wi…

A Novel Two-Parameter Penalty: Relaxation Degree Analysis and Sparse Signal Recovery

Matrix-Weighted Poincaré-Type Inequalities with Applications to Logarithmic Hajłasz--Besov Spaces on Spaces of Homogeneous Type

Pointwise Multipliers for Besov Spaces Bp,∞0,b​(Rn) with Only Logarithmic Smoothness

Pointwise Multipliers for Besov Spaces $B_{p, \infty}^{0, b} (R^{n})$ with Only Logarithmic Smoothness