Kuo-Zhong Wang

activity

20132016

most citedNumerical Radii for Tensor Products of Matrices

9 citations · 12 across the 7 of their papers we have counts for

collaborators

Showing 2015Show all

3 papers · 1 filter

math.RA2015

Product of two positive contractions

Chi-Kwong Li, Diane Christine Pelejo, Kuo-Zhong Wang

Several characterizations are given for a square matrix that can be written as the product of two positive (semidefinite) projections. Based on one of these characterizations, and…

math.FA2015★ 2 cited

Numerical Ranges of the product of Operators

Hongke Du, Chi-Kwong Li, Kuo-Zhong Wang +2

We study containment regions of the numerical range of the product of operators $A$ and $B$ such that $W (A)$ and $W (B)$ are line segments. It is shown that the containment region i…

math.MG2015★ 1 cited

Minkowski product of convex sets and product numerical range

Chi-Kwong Li, Diane Christine Pelejo, Yiu-Tung Poon +1

Let $K_{1}, K_{2}$ be two compact convex sets in $C$ . Their Minkowski product is the set $K_{1} K_{2} = {ab : a \in K_{1}, b \in K_{2}}$ . We show that the set $K_{1} K_{2}$ is star-shaped i…