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The boundary of higher rank numerical ranges

โœ Scribed by Mao-Ting Chien; Hiroshi Nakazato


Book ID
113771964
Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
594 KB
Volume
435
Category
Article
ISSN
0024-3795

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Let M n be the semigroup of n ร— n complex matrices under the usual multiplication, and let S be different subgroups or semigroups in M n including the (special) unitary group, (special) general linear group, the semigroups of matrices with bounded ranks. Suppose ฮ› k (A) is the rank-k numerical range