摘要
In this paper, all subvarieties of the varieties Ak (k ∈N) generated by aperiodic commutative semigroups are characterized. Based on this characterization, the structure of lattice of subvarieties of Ak is investigated.
In this paper, all subvarieties of the varieties Ak (k ∈N) generated by aperiodic commutative semigroups are characterized. Based on this characterization, the structure of lattice of subvarieties of Ak is investigated.
基金
Supported by the National Natural Science Foundation of China (Grant No.10571077)
the Natural Science Foundation of Gansu Province (Grant No.3ZS032-A25-017)