Ya-Shu Wang

activity

20192024

most citedJoint numerical ranges and communtativity of matrices

1 citations · 2 across the 5 of their papers we have counts for

collaborators

Showing 2020Show all

2 papers · 1 filter

math.RA2020★ 1 cited

Nonsurjective zero product preservers between matrix spaces over an arbitrary field

Chi-Kwong Li, Ming-Cheng Tsai, Ya-Shu Wang +1

A map $Φ$ between matrices is said to be zero product preserving if $Φ (A) Φ (B) = 0 whenever A B = 0.$ In this paper, we give concrete descriptions of an additiv…

math.FA2020★ 1 cited

Joint numerical ranges and communtativity of matrices

Chi-Kwong Li, Yiu-Tung Poon, Ya-Shu Wang

The connection between the commutativity of a family of $n \times n$ matrices and the generalized joint numerical ranges is studied. For instance, it is shown that $F$ is a f…