Results 111 to 120 of about 12,672,108 (295)

A gap theorem for the ZL-amenability constant of a finite group [PDF]

open access: yesInternational Journal of Group Theory, 2016
It was shown in [A. Azimifard, E. Samei, N. Spronk, JFA 256 (2009)] that the ZL-amenability constant of a finite group is always at least~$1$, with equality if and only if the group is abelian. It was also shown in [A. Azimifard, E. Samei, N.
Yemon Choi
doaj  

On a variation of Sands' method

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 1986
A subset of a finite additive abelian group G is a Z-set if for all a∈G, na∈G for all n∈Z. The group G is called “Z-good” if in every factorization G=A⊕B, where A and B are Z-sets at least one factor is periodic. Otherwise G is called “Z-bad.”
Evelyn E. Obaid
doaj   +1 more source

Growth functions for some uniformly amenable groups

open access: yesOpen Mathematics, 2017
We present a simple constructive proof of the fact that every abelian discrete group is uniformly amenable. We improve the growth function obtained earlier and find the optimal growth function in a particular case.
Dronka Janusz   +3 more
doaj   +1 more source

C*-algebras on r-discrete Abelian Groupoids [PDF]

open access: yesJournal of Sciences, Islamic Republic of Iran, 2017
We study certain function algebras and their operator algebra completions on r-discrete abelian groupoids, the corresponding conditional expectations, maximal abelian subalgebras (masa) and eigen-functionals.
H. Myrnouri
doaj  

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