Results 161 to 170 of about 2,610 (179)

Hybridization breaks species barriers in long-term coevolution of a cyanobacterial population. [PDF]

Elife
Birzu G, Subrahmaniam Muralidharan H, Goudeau D, Malmstrom RR, Fisher DS, Bhaya D.   +5 more
europepmc   +1 more source

Tangerine : a Starship -like element in the genomes of Xanthoria lichen-forming fungi

Tagirdzhanova G, Bucknell A, Cameron ES, Finn RD, Blaxter M, McDonald MC, Talbot NJ.   +6 more
europepmc   +1 more source

Haplotype-resolved genomes of diverse oat crown rust isolates reveal both global dispersion of long-lived clonal haplotypes and limited recombination between haplotypes.

Henningsen E, Nazareno EN, Spanner R, Lewis D, Lubega J, Moreau EP, Moscou MJ, Boesen B, Stone E, Kanyuka K, Kianian SF, Steffenson BJ, Dodds P, Sperschneider J, Figueroa M.   +14 more
europepmc   +1 more source

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WLR-regular orthogroups

Semigroup Forum, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhang, Jiangang, Song, Guangtian, Liu, Guoxin   +2 more
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LR-normal orthogroups

Science in China Series A, 2006
A regular semigroup \(S\) satisfying the condition \(eS\subseteq Se\) or \(Se\subseteq eS\) for every idempotent \(e\) is a completely regular orthodox semigroup and is called an \(LR\)-regular orthogroup. \(S\) is called an \(LR\)-normal orthogroup if in addition its set \(E(S)\) of all idempotens forms a normal band, that is, \(efge=egfe\) for all ...
Guo, Yugi, Shum, K. P., Sen, M. K.
openaire   +2 more sources

ON GENERALIZED ORTHOGROUPS

Communications in Algebra, 2001
A simple and nice structure theorem for orthogroups was given by Petrich in 1987. In this paper, we consider a generalized orthogroup, that is, a quasi-completely regular semigroup with a band of idempotents in which its set of regular elements, namely, RegS, forms an ideal of S.
X. M. Ren, K. P. Shum
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Global determinism of normal orthogroups

Semigroup Forum, 2016
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Zhao, Xianzhong, Gan, Aiping, Yu, Baomin
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All varieties of regular orthogroups

Semigroup Forum, 1985
An orthogroup is a union of groups in which the idempotents form a subsemigroup (orthodox union of groups). If in addition the idempotents form a regular band, the semigroup is a regular orthogroup. These semigroups form a variety when considered as semigroups with an inverse.
Gerhard, J. A., Petrich, Mario
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Orthogroups with an associate subgroup

Acta Mathematica Hungarica, 2009
An orthogroup is defined as a semigroup 1) which is a union of its subgroups and 2) its idempotents form a subsemigroup. A subgroup of a semigroup \(S\) is referred to as an associate subgroup if for every element \(s\in S\) there exists exactly one element \(s^*\in G\) such that \(s=ss^*s\).
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Hall-type representations for generalised orthogroups

Semigroup Forum, 2014
An orthodox semigroup is called orthogroup if it is completely regular. Let \(U\) be a subset of the set \(E(S)\) of all idempotents of a semigroup \(S\). Let \(a\widetilde{\mathcal L}_U b\) iff \((\forall e\in U)(ae=a\Leftrightarrow be=b)\). Dually, the relation \(\widetilde{\mathcal R}_U\) is defined. \(S\) is called weakly \(U\)-abundant if every \(\
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