Geodesic
Positive definiteness of tridiagonal matrices via the numerical range
The electronic journal of linear algebra, Tome 3 (1998), pp. 93-102.

Voir la notice de l'article provenant de la source Electronic Library of Mathematics

Classification : 15A60, 15A57
Keywords: positive definite, tridiagonal matrices, numerical range, spread AMS subject 
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     title = {Positive definiteness of tridiagonal matrices via the numerical range},
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Chien, Mao-Ting; Neumann, Michel. Positive definiteness of tridiagonal matrices via the numerical range. The electronic journal of linear algebra, Tome 3 (1998), pp. 93-102. http://geodesic.mathdoc.fr/item/ELA_1998__3__a4/