Results 121 to 130 of about 262,182 (221)

Topological grading of semigroup C*-algebras

open access: yes, 2020
© Author(s), 2020 The paper deals with the abelian cancellative semigroups and the reduced semigroup C*-algebras. It is supposed that there exist epimorphisms from the semigroups onto the group of integers modulo n.
Gumerov R.N., Lipacheva E.V.
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The Set of Idempotents in the Weakly Almost Periodic Compactification of the Integers is not Closed [PDF]

open access: yes, 2000
This paper answers negatively the question of whether the sets of idempotents in the weakly almost periodic compacti?cations of (N; +) and (Z; +) are ...
Pym, J.S., Bordbar, Behzad
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Extremal topologies on a semigroup

open access: yesTopology and its Applications, 1991
Given a semigroup \((S,+)\) with discrete topology \(\tau_ d\), and given a set \({\mathcal A}\) of topologies on \(S\), an element \(\tau\) of \({\mathcal A}\) is said to be extremal (in \({\mathcal A})\) if (i) \(\tau\neq\tau_ d\) and (ii) if \(\tau\subseteq\tau'\in{\mathcal A}\) and \(\tau\neq\tau'\), then \(\tau'=\tau_ d\). The author shows that if
openaire   +2 more sources

Existence of a utility on a topological semigroup [PDF]

open access: yes, 1975
Gottinger HW. Existence of a utility on a topological semigroup. Working Papers. Institute of Mathematical Economics. Vol 25.
Gottinger, Hans Werner
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