Sun, Xiaomei; Chen, Wenyi The continuity of the second best constant for Sobolev inequalities on the vector valued maps. (English) Zbl 1240.46065 J. Math., Wuhan Univ. 30, No. 2, 243-251 (2010). MSC: 46E35 49J40 53C21 PDFBibTeX XMLCite \textit{X. Sun} and \textit{W. Chen}, J. Math., Wuhan Univ. 30, No. 2, 243--251 (2010; Zbl 1240.46065)
Cheng, Meiyu; Li, Xinghua Multiplicative maps on matrices that preserve the trace. (Chinese. English summary) Zbl 1066.15018 J. Math., Wuhan Univ. 24, No. 1, 4-6 (2004). MSC: 15A30 15A04 15A18 20M20 PDFBibTeX XMLCite \textit{M. Cheng} and \textit{X. Li}, J. Math., Wuhan Univ. 24, No. 1, 4--6 (2004; Zbl 1066.15018)