A note on Rotfel'd Theorem in a sector

作者：Huang, Shaowu; Wang, Qing-Wen^*; Yu, Yaoming

来源：Linear and Multilinear Algebra, 2017, 65(8): 1655-1661.

DOI：10.1080/03081087.2016.1251544

• Rotfel'd Theorem
• concave function
• numerical range
• unitarily invariant norm
• 47A63
• 15A45

The main purpose of this work is to present a better bound than the recent result given by Zhang [Linear Multilinear Algebra. 2015;63:2511-2517].

• 出版日期2017
• 单位上海大学; 上海师范大学