@article {17743,
	title = {Two Simple Residual Bounds for the Eigenvalues of Hermitian Matrices},
	volume = {UMIACS-TR-89-123},
	year = {1998},
	month = {1998/10/15/},
	institution = {Instititue for Advanced Computer Studies, Univ of Maryland, College Park},
	abstract = {Let $A$ be Hermitian and let the orthonormal columns of $X$ span anapproximate invariant subspace of $X$.  Then the residual $R = AX-XM$
$(M=X\ctp AX)$ will be small.  The theorems of this paper bound the
distance of the spectrum of $M$ from the spectrum of $A$ in terms of
appropriate norms of $R$.
Appeared in SIAM J. Mat. Anal. Appl. 12 (1991) 205--208.
(Also cross-referenced as UMIACS-TR-89-123)
},
	keywords = {Technical Report},
	url = {http://drum.lib.umd.edu/handle/1903/545},
	author = {Stewart, G.W.}
}
