Skip to content

Author

Zhe-Kai Pang

We have 2 of 10 papers

We haven’t gathered this author’s papers yet. Follow them and we’ll fetch their work.

Not the right person? Other researchers publish under this name.

Preprint Oct 2026

A sharp weighted commutator inequality for rank-one matrices

Let $A\in\mathbb{C}^{n\times n}$ be positive definite Hermitian, where $n\ge 2$, and define $\|X\|_A^2=\mathrm{tr}(AX^*X)$ for all $X\in\mathbb{C}^{n\times n}$. We determine the smallest constant $C_A$ for which $$ \|XY-YX\|_{\mathrm{F}}^2 \le C_A\|X\|_A^2\|Y\|_A^2 $$ holds for all rank-one $X,Y\in\mathbb{C}^{n\times n...

Zhe-Kai Pang · 0 citations
Preprint Sep 2026

A Gamma envelope and sharp moment inequalities for Gaussian quadratic forms

We study extremal absolute central moments of Gaussian quadratic forms under a fixed Frobenius norm. For a nonzero real symmetric matrix $M$ and $G\sim N(0,I_n)$, we construct an explicit centered difference of Gamma variables with the same mean, variance, and third centered moment as $G^{\mathsf T}MG-\operatorname{tr}...

Zhe-Kai Pang · 0 citations

We use cookies to run the site and, with your consent, for analytics and to show ads. See our Cookie Policy.