Speaker
Rute Lemos
(CIDMA, University of Aveiro, Portugal)
Description
The higher rank numerical range is investigated for 2-by-2 block matrices with associated Kippenhahn curves consisting of ellipses and eventually points. As a consequence, elliptical higher rank numerical range results are derived in a unified way, using an approach developed by Spitkovsky et al.
Author
Rute Lemos
(CIDMA, University of Aveiro, Portugal)
Co-authors
Natália Bebiano
(CMUC, University of Coimbra)
Graça Soares
(CMAT-UTAD, University of Trás-os-Montes e Alto Douro)