Open AccessNorm for Sums of Two Basic Elementary Operators
Author(s) -
A. Bachir,
Farida Lombarkia,
A. Segres
Publication year - 2012
Publication title -
international journal of mathematics and mathematical sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 39
eISSN - 1687-0425
pISSN - 0161-1712
DOI - 10.1155/2012/643568
Subject(s) - mathematics , norm (philosophy) , numerical range , operator norm , algebra over a field , pure mathematics , operator theory , political science , law
We give necessary and sufficient conditions under which the norm of basic elementary operators attains its optimal value in terms of the numerical range
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