標題: UPPER AND LOWER BOUNDS FOR NUMERICAL RADII OF BLOCK SHIFTS
作者: Gau, H-L.
Wu, P. Y.
應用數學系
Department of Applied Mathematics
關鍵字: Numerical radius;block shift;minimum modulus
公開日期: 十二月-2015
摘要: For an n-by-n complex matrix A in a block form with the (possibly) nonzero blocks only on the diagonal above the main one, we consider two other matrices whose nonzero entries are along the diagonal above the main one and consist of the norms or minimum moduli of the diagonal blocks of A. In this paper, we obtain two inequalities relating the numeical radii of these matrices and also determine when either of them becomes an equality.
URI: http://hdl.handle.net/11536/133569
ISSN: 1735-8515
期刊: BULLETIN OF THE IRANIAN MATHEMATICAL SOCIETY
Volume: 41
Issue: 7
起始頁: 15
結束頁: 27
顯示於類別:期刊論文