Notes on some spectral radius and numerical radius inequalities
Amer Abu-Omar ; Fuad Kittaneh
Studia Mathematica, Tome 231 (2015), p. 97-109 / Harvested from The Polish Digital Mathematics Library
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We prove numerical radius inequalities for products, commutators, anticommutators, and sums of Hilbert space operators. A spectral radius inequality for sums of commuting operators is also given. Our results improve earlier well-known results.

Publié le : 2015-01-01
EUDML-ID : urn:eudml:doc:285867 
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Amer Abu-Omar; Fuad Kittaneh. Notes on some spectral radius and numerical radius inequalities. Studia Mathematica, Tome 231 (2015) pp. 97-109. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-doi-10_4064-sm227-2-1/