Idempotent-connected abundant semigroups

A El-Qallali, JB Fountain - Proceedings of the Royal Society of …, 1981 - cambridge.org
… The class of IC abundant semigroups with commuting idempotents is precisely the class of
type A semigroups. A homomorphic image of an abundant semigroup need not be abundant

Abundant semigroups with medial idempotents

A El-Qallali - Categories and General Algebraic Structures with …, 2021 - cgasa.sbu.ac.ir
… [19] prove that any regular semigroup which is locally inverse … that any abundant semigroup
with an ample multiplicative … If S is idempotentconnected (as defined in [8]) and 〈E〉 is a …

Fundamental representations for classes of semigroups containing a band of idempotents

AE Qallali, J Fountain, V Gould - Communications in Algebra, 2008 - Taylor & Francis
… We consider weakly U-abundant semigroups, where U is a subset of idempotents of a … the
weak idempotent connected condition (WIC), that coincides with (IC) for abundant semigroups, …

The natural partial order on an abundant semigroup

MV Lawson - Proceedings of the Edinburgh Mathematical Society, 1987 - cambridge.org
… The class of idempotent connected (IC) abundant semigroups was introduced by El-Qallali
and Fountain [11]. We begin this section with an alternative characterisation of these …

Fundamental semigroups having a band of idempotents

GMS Gomes, V Gould - Semigroup Forum, 2008 - Springer
… Here we consider weakly U-abundant semigroups, where U is a subset of idempotents of a
… The aim of this paper is to remove the idempotent connected condition from the results of [4, 5…

Left quasi-abundant semigroups

Z Ji, X Ren, Y Wang - Journal of the Korean Mathematical Society, 2019 - koreascience.kr
abundant semigroups. In addition, we consider a type Q semigroup which is a left quasi-abundant
semigroup … This condition is named idempotent-connected condition (for brevity, IC). In …

Beyond regular semigroups

Y Wang - 2012 - etheses.whiterose.ac.uk
… U-abundant semigroups, using both techniques developed for regular and abundant semigroups,
and … for the lack of an idempotent connected condition and the fact on semigroups are …

[PDF][PDF] A class of quasi-adequate transformation semigroups

A Umar - Portugaliae Mathematica, 1994 - emis.icm.edu.pl
… analogues of orthodox semigroups in the abundant semigroup … R∗-unipotent semigroup is
an abundant semigroup S in which … semigroup and that of its left regular band of idempotents. …

Ordered abundant semigroups with adequate transversals

A El-Qallali - Communications in Algebra, 2022 - Taylor & Francis
abundant semigroups were first investigated by Lawson [Citation15] where he proved for the
natural partial order relation η defined on an idempotent-connected abundant semigroup S (…

[PDF][PDF] Structure of concordant semigroups

S Armstrong - Journal of Algebra, 1988 - core.ac.uk
… We find that the *-trace of an abundant semigroup has the … , for abundant semigroups. We
then find conditions which are satisfied by the structure mappings of an abundant semigroup, …