Geodesic
Some variations on the concept of the c-numerical range
Portugaliae mathematica, Tome 43 (1985) no. 1, pp. 189-200.

Voir la notice de l'article provenant de la source European Digital Mathematics Library

Keywords: determinant, trace, eigenvalues, c-numerical range 
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     author = {Bebiano, Nat\'alia},
     title = {Some variations on the concept of the c-numerical range},
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Bebiano, Natália. Some variations on the concept of the c-numerical range. Portugaliae mathematica, Tome 43 (1985) no. 1, pp. 189-200. http://geodesic.mathdoc.fr/item/PORMA_1985__43_1_114502/