@article {17691,
	title = {Backward Error Bounds for Approximate Krylov Subspaces},
	volume = {UMIACS-TR-2001-32},
	year = {2001},
	month = {2001/05/10/},
	institution = {Instititue for Advanced Computer Studies, Univ of Maryland, College Park},
	abstract = {Let $A$ be a matrix of order $n$ and let $\clu\subset\comp^{n}$ be asubspace of dimension $k$.  In this note we determine a matrix $E$ of
minimal norm such that $\clu$ is a Krylov subspace of $A+E$.
(Cross-referenced as UMIACS-TR-2001-32)
},
	keywords = {Technical Report},
	url = {http://drum.lib.umd.edu/handle/1903/1133},
	author = {Stewart, G.W.}
}
