Factorable and strictly singular operators in a product space
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Horacio Porta (1971)
Studia Mathematica
T. Figiel (1973)
Studia Mathematica
Elias Saab (1974/1975)
Séminaire Choquet. Initiation à l'analyse
M. Mathieu, G. J. Schick (2002)
Studia Mathematica
A linear mapping T from a subspace E of a Banach algebra into another Banach algebra is defined to be spectrally bounded if there is a constant M ≥ 0 such that r(Tx) ≤ Mr(x) for all x ∈ E, where r(·) denotes the spectral radius. We study some basic properties of this class of operators, which are sometimes analogous to, sometimes very different from, those of bounded operators between Banach spaces.
Karapınar, Erdal (2009)
Fixed Point Theory and Applications [electronic only]
Warren B. Moors (2016)
Fundamenta Mathematicae
The purpose of this note is two-fold: firstly, to give a new and interesting result concerning separate and joint continuity, and secondly, to give a stream-lined (and self-contained) proof of the fact that "tame" CHART groups are topological groups.
Joram Lindenstrauss, David Preiss, Jaroslav Tišer (2010)
Journal of the European Mathematical Society
Alexander A. Pankov (1986)
Czechoslovak Mathematical Journal
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