Goerisch, Friedrich; Albrecht, Julius: The convergence of a new method for calculating lower bounds to eigenvalues.
(English).
In:
Vosmanský, Jaromír
and Zlámal, Miloš (eds.): Equadiff 6.
Proceedings of the International Conference on Differential Equations and Their Applications held in Brno, Czechoslovakia, Aug. 26 - 30, 1985.
J. E. Purkyně University, Department of Mathematics, Brno, 1986.
pp. [303]-308
Wimmer, Harald K.; Ziebur, Allen D.:
Remarks on inertia theorems for matrices.
(English).Czechoslovak Mathematical Journal,
vol. 25
(1975),
issue 4,
pp. 556-561