Fahmy, M. M.; Mohamed, I. H. Comments on ”A new lower bound on the cost of optimal regulators”. (English) Zbl 0449.49001 IEEE Trans. Autom. Control 25, 857-858 (1980). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 49J15 Existence theories for optimal control problems involving ordinary differential equations 93C05 Linear systems in control theory 93C99 Model systems in control theory Keywords:algebraic Riccati; Lyapunov matrix equations; quadratic cost Citations:Zbl 0397.49004 PDFBibTeX XMLCite \textit{M. M. Fahmy} and \textit{I. H. Mohamed}, IEEE Trans. Autom. Control 25, 857--858 (1980; Zbl 0449.49001) Full Text: DOI