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2021-04-16
On Kippenhahn curves and higher-rank numerical ranges of some matrices
Natália BebianoJoáo da ProvidénciaIlya M. Spitkovsky
文献摘要
The higher rank numerical ranges of generic matrices are described in terms of the components of their Kippenhahn curves. Cases of tridiagonal (in particular, reciprocal) 2-periodic matrices are treated in more detail.
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