Wei-Qiang Huang

collaborators

2 papers

math.FA2026

On Circular Numerical Ranges of Companion Matrices with Repeated Eigenvalues

Hsin-Yi Lee, Wei-Qiang Huang

We prove that if an $n \times n (n > 3)$ companion matrix $A$ with the spectrum $σ (A) = {a}$ has a circular numerical range, then $A$ is the Jordan block. This problem can be d…

math.NA2017

iSIRA: Integrated Shift-Invert Residual Arnoldi Method for Graph Laplacian Matrices from Big Data

Wei-Qiang Huang, Wen-Wei Lin, Henry Horng-Shing Lu +1

The eigenvalue problem of a graph Laplacian matrix $L$ arising from a simple, connected and undirected graph has been given more attention due to its extensive applications, such a…