Publication IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer SciencesVol.E77-ANo.3pp.571-572 Publication Date: 1994/03/25 Online ISSN: DOI: Print ISSN: 0916-8508 Type of Manuscript: LETTER Category: Control and Computing Keyword: discrete Lyapunov, matrix equation, lower bounds,
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Summary: For a discrete Lyapunov matrix equation, we present another such equation that shares the solution to the original one. This renders some existing lower bounds for measures of the size of the solution meaningful, when they yield only trivial bounds. A generalization of this result is suggested.