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- University of TehranIR5 papers
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3 papers · 1 filter
math.FA2014
Spectral radius, numerical radius, and the product of operators
Rahim Alizadeh, Mohammad B. Asadi, Che-Man Cheng +2
Let , and denote the spectrum, spectral radius and numerical radius of a bounded linear operator on a Hilbert space , respectively. We show that a linear…
math.FA2013
Filters and the weakly almost periodic compactification of a semitopological semigroup
M. Akbari Tootkaboni
Let be a semitopological semigroup. The compactification of semigroup S, is a compact semitopological semigroup with certain universal properties relative to the origina…
math.FA2009
Filters and Semigroup Compactification Properties
M. Akbari Tootkaboni, H. R. E. Vishki
Stone-ech compactifications derived from a discrete semigroup can be considered as the spectrum of the algebra or as a collection of ultrafilters on…