Qiu, Zhijian On pointwise bounded approximation. (English) Zbl 1173.30022 Acta Math. Sin., Engl. Ser. 25, No. 7, 1217-1222 (2009). Reviewer: Vasily A. Chernecky (Odessa) MSC: 30E10 46E15 47B20 30H05 PDFBibTeX XMLCite \textit{Z. Qiu}, Acta Math. Sin., Engl. Ser. 25, No. 7, 1217--1222 (2009; Zbl 1173.30022) Full Text: DOI
Qiu, ZhiJian Beurling’s theorem and invariant subspaces for the shift on Hardy spaces. (English) Zbl 1155.47011 Sci. China, Ser. A 51, No. 1, 131-142 (2008). Reviewer: Željko Čučković (Toledo) MSC: 47A15 47B20 30H05 30E10 46E15 PDFBibTeX XMLCite \textit{Z. Qiu}, Sci. China, Ser. A 51, No. 1, 131--142 (2008; Zbl 1155.47011) Full Text: DOI arXiv
Qiu, Zhi-jian On quasi-similarity of subnormal operators. (English) Zbl 1123.47021 Sci. China, Ser. A 50, No. 3, 305-312 (2007). Reviewer: Paul McGuire (Lewisburg) MSC: 47B20 46E15 PDFBibTeX XMLCite \textit{Z.-j. Qiu}, Sci. China, Ser. A 50, No. 3, 305--312 (2007; Zbl 1123.47021) Full Text: DOI