| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 8897852 | Linear Algebra and its Applications | 2018 | 20 Pages |
Abstract
The higher rank numerical range is described for a class of matrices which happen to be unitarily reducible to direct sums of (at most) 2-by-2 blocks. In particular, conditions are established under which tridiagonal matrices have elliptical rank-k numerical ranges.
Keywords
Related Topics
Physical Sciences and Engineering
Mathematics
Algebra and Number Theory
Authors
Maria Adam, Aikaterini Aretaki, Ilya M. Spitkovsky,