Results 211 to 220 of about 1,081,899 (283)

On regular semigroups

open access: yesJournal of Algebra, 1973
openaire   +1 more source

Modular geodesics and wedge domains in non-compactly causal symmetric spaces. [PDF]

open access: yesAnn Glob Anal Geom (Dordr)
Morinelli V, Neeb KH, Ólafsson G.
europepmc   +1 more source

Regular Orthocryptou Semigroups

Semigroup Forum, 2004
The semigroups in this paper are defined using two kinds of generalized Green's relations defined elsewhere. A semigroup \(S\) is superabundant if each \(H^*\)-class contains an idempotent and \(S\) is semisuperabundant if both each \(\widetilde L\)- and \(\widetilde R\)-class contains at least one idempotent. A semigroup is a \(u\)-semigroup if it has
Wang, Zhengpan, Zhang, Ronghua, Xie, Mu
openaire   +2 more sources

Weakly regular *-semigroups

Semigroup Forum, 1999
A regular \(*\)-semigroup is a semigroup \(S\) endowed with a supplementary operation \(*\) satisfying: (1) \(xx^*=x\), for every \(x\in S\); (2) \((x^*)^*=x\), for every \(x\in S\); (3) \((xy)^*=y^*x^*\), for every \(x,y\) in \(S\). It has been proved by \textit{M.
openaire   +2 more sources

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