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Ideals in intra-regular left almost semigroups
LA-semigroups intra-regular LA-semigroups and (1, 2)-ideals
2011/2/28
In this paper, we have introduced the notion of (1, 2)-ideal in an LA-semigroup and shown that (1, 2)-ideal and two-sided ideal coincide in an intra-regular LA-semigroup.
One-regular normal Cayley graphs on dihedral groups of valency 4 or 6 with cyclic vertex stabilizer
one-regular graph Cayley graph dihedral group half-transitive graph
2007/12/10
A graph $G$ is $one$-$regular$ if its automorphism group ${\rm Aut}(G)$ acts transitively and semi-regularly on the arc set. A Cayley graph ${\rm Cay}(\Gamma,S)$ is {\it normal} if $\Gamma$ is a norma...
Some characterizations of strongly regular rings will be given. Let R be a ring and I(\neq R) a right ideal of R. If, for each pair of right ideals A and B of R, AB \subseteq I implies that either A \...