Linear operators preserving the numerical range (radius) on triangular matrices

Authors
Li, CK Semrl, P Soares, G
Citation
Ck. Li et al., Linear operators preserving the numerical range (radius) on triangular matrices, LINEAR MULT, 48(4), 2001, pp. 281-292
Citations number
12
Categorie Soggetti
Mathematics
Journal title
LINEAR & MULTILINEAR ALGEBRA
ISSN journal
03081087 → ACNP
Volume
48
Issue
4
Year of publication
2001
Pages
281 - 292
Database
ISI
SICI code
0308-1087(2001)48:4<281:LOPTNR>2.0.ZU;2-3
Abstract
We characterize those linear operators on triangular or diagonal matrices p reserving the numerical range or radius.