Li, Huacan; Xing, Yuming; Li, Qunfang The two weighted Poincaré norm inequalities for the composition of Green operator and homotopy operator. (English) Zbl 1324.47036 J. Nat. Sci. Heilongjiang Univ. 31, No. 4, 484-489 (2014). MSC: 47A63 47B33 PDFBibTeX XMLCite \textit{H. Li} et al., J. Nat. Sci. Heilongjiang Univ. 31, No. 4, 484--489 (2014; Zbl 1324.47036) Full Text: DOI
Liu, Jianzhong An inequality for positive-definite operators in Hilbert spaces. (Chinese. English summary) Zbl 1076.47502 Heilongjiangdaxue Ziran Kexue Xuebao 18, No. 1, 17-18 (2001). MSC: 47A63 47A30 PDFBibTeX XMLCite \textit{J. Liu}, J. Nat. Sci. Heilongjiang Univ. 18, No. 1, 17--18 (2001; Zbl 1076.47502)