Mario Blaum, John L. Fan, et al.
IEEE International Symposium on Information Theory - Proceedings
Let A be a normal matrix with eigenvalues λ1, λ2,..., λn, and let G{cyrillic} denote the smallest disc containing these eigenvalues. We give some inequalities relating the center and radius of G{cyrillic} to the entries in A. When applied to Hermitian matrices our results give lower bounds on the spread maxij(λi - λj) of A. When applied to positive definite Hermitian matrices they give lower bounds on the Kantorovich ratio maxij(λi - λj)/(λi + λj). © 1994.
Mario Blaum, John L. Fan, et al.
IEEE International Symposium on Information Theory - Proceedings
W.C. Tang, H. Rosen, et al.
SPIE Optics, Electro-Optics, and Laser Applications in Science and Engineering 1991
S.F. Fan, W.B. Yun, et al.
Proceedings of SPIE 1989
Leo Liberti, James Ostrowski
Journal of Global Optimization