Wu, Hanzhong; Li, Xunjing An infinite horizon linear-quadratic problem with unbounded controls in a Hilbert space. (Chinese. English summary) Zbl 1065.49021 Acta Math. Sin. 46, No. 4, 721-728 (2003). MSC: 49N10 93C25 PDFBibTeX XMLCite \textit{H. Wu} and \textit{X. Li}, Acta Math. Sin. 46, No. 4, 721--728 (2003; Zbl 1065.49021)
Wu, Hanzhong; Li, Xunjing An infinite horizon linear quadratic problem with unbounded controls in Hilbert space. (English) Zbl 0980.49029 Acta Math. Sin., Engl. Ser. 17, No. 3, 527-540 (2001). MSC: 49N10 93C25 PDFBibTeX XMLCite \textit{H. Wu} and \textit{X. Li}, Acta Math. Sin., Engl. Ser. 17, No. 3, 527--540 (2001; Zbl 0980.49029) Full Text: DOI
Wu, Hanzhong; Li, Xunjing A linear quadratic problem with unbounded control in Hilbert spaces. (English) Zbl 0999.49021 Differ. Integral Equ. 13, No. 4-6, 529-566 (2000). MSC: 49N10 47N70 49J20 93C25 35B37 PDFBibTeX XMLCite \textit{H. Wu} and \textit{X. Li}, Differ. Integral Equ. 13, No. 4--6, 529--566 (2000; Zbl 0999.49021)
Wu, Hanzhong; Li, Xunjing Linear-quadratic problem with unbounded control in Hilbert spaces. (English) Zbl 0997.49025 Chin. Sci. Bull. 43, No. 20, 1712-1717 (1998). MSC: 49N10 49K27 93C25 PDFBibTeX XMLCite \textit{H. Wu} and \textit{X. Li}, Chin. Sci. Bull. 43, No. 20, 1712--1717 (1998; Zbl 0997.49025) Full Text: DOI
Li, Xunjing; Wu, Hanzhong The equivalence between two types of exponential stabilities. (English) Zbl 1026.47503 Chin. Sci. Bull. 43, No. 18, 1583-1584 (1998). MSC: 47D06 34D99 PDFBibTeX XMLCite \textit{X. Li} and \textit{H. Wu}, Chin. Sci. Bull. 43, No. 18, 1583--1584 (1998; Zbl 1026.47503) Full Text: DOI