期刊
LINEAR & MULTILINEAR ALGEBRA
卷 63, 期 2, 页码 296-301出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/03081087.2013.865732
关键词
principal power; operator norm; geometric mean; symbolic calculus; numerical range; 15A45
类别
We study principal powers of complex square matrices with positive definite real part, or with numerical range contained in a sector. We extend the notion of geometric mean to such matrices and we establish an operator norm bound in this context.
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