Geodesic
Isotropic subspaces for pairs of Hermitian matrices
The electronic journal of linear algebra, Tome 17 (2008), pp. 508-517.

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

Summary: The maximal dimension of a subspace which is neutral with respect to two hermitian matrices simultaneously, is identified (in many cases) in terms of inertia of linear combinations of the matrices.
Classification : 15A57
Keywords: neutral subspace, isotropic subspace, Hermitian matrices 
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     title = {Isotropic subspaces for pairs of {Hermitian} matrices},
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Rodman, Leiba X. Isotropic subspaces for pairs of Hermitian matrices. The electronic journal of linear algebra, Tome 17 (2008), pp. 508-517. http://geodesic.mathdoc.fr/item/ELA_2008__17__a8/