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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… Click to show full abstract
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:
rank numerical;
rank;
higher rank;
numerical range;
matrices elliptical
Journal Title: Linear Algebra and its Applications
Year Published: 2018
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Journal Title: Linear Algebra and its Applications
Year Published: 2018
Link to full text (if available)
Share on Social Media: Sign Up to like & get
recommendations!