Abstract
By using equivalence conditions for sectorial matrices obtained by Alakhrass and Sababheh in Linear Algebra Appl. (2020;586), we improve a Rotfel'd type inequality for sectorial matrices derived by Zhang in Linear Multilinear Algebra (2015;63) and generalize a recent result of Mao and Ji in Linear Algebra Appl. (2024;691).
Acknowledgments
The authors thank professor Minghua Lin for reading the original version of this article and giving several valuable suggestions.
Disclosure statement
No potential conflict of interest was reported by the author(s).