Title
Eigenvalues of the Sum of Matrices from Unitary Similarity Orbits
Abstract
Let $A$ and $B$ be $n\times n$ complex matrices. Characterization is given for the set ${\cal E}(A,B)$ of eigenvalues of matrices of the form $U^*AU+V^*BV$ for some unitary matrices $U$ and $V$. Consequences of the results are discussed and computer algorithms and programs are designed to generate the set ${\cal E}(A,B)$. The results refine those of Wielandt on normal matrices. Extensions of the results to the sum of matrices from three or more unitary similarity orbits are also considered.
Year
DOI
Venue
2008
10.1137/070699123
SIAM J. Matrix Analysis Applications
Keywords
Field
DocType
complex matrix,normal matrix,times n,cal e,davis-wielandt shell.,unitary similarity orbit,unitary similarity orbits,unitary matrix,sum of matrices,. eigenvalues,computer algorithm,eigenvalues,normal matrices
Linear algebra,Combinatorics,Circular ensemble,Matrix (mathematics),Unitary matrix,Unitary state,Higher-dimensional gamma matrices,Eigenvalues and eigenvectors,Mathematics,Normal matrix
Journal
Volume
Issue
ISSN
30
2
0895-4798
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
Chi-Kwong Li131329.81
Yiu-Tung Poon2122.82
Nung-Sing Sze3144.45