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On saturated varieties of posemigroups
Algebra universalis ( IF 0.6 ) Pub Date : 2020-08-29 , DOI: 10.1007/s00012-020-00679-1
Shabir Ahmad Ahanger , Aftab Hussain Shah , Noor Mohammad Khan

We show that a permutative variety of posemigroups satisfying a permutation identity \(x_1x_2\cdots x_n=x_{i_1}x_{i_2}\cdots x_{i_n}\) with \(i_1\ne 1~ \text{ and }~i_{n-1}\ne n-1 ~[i_n\ne n~\text{ and }~i_{2}\ne 2]\) is saturated if and only if it admits an identity I such that I is not a permutation identity and at least one side of I has no repeated variables. Then we show that the variety of po-rectangular bands is saturated. Finally, we show that a posemigroup S is saturated if the subposemigroup \(S^n\), the product of n copies of S, is saturated for some positive integer n.



中文翻译:

关于posemigroups的饱和变体

我们证明了满足置换身份\(x_1x_2 \ cdots x_n = x_ {i_1} x_ {i_2} \ cdots x_ {i_n} \)的置换姿势组具有\(i_1 \ ne 1〜\ text {和}〜i_ {n-1} \ ne n-1〜[i_n \ ne n〜\ text {和}〜i_ {2} \ ne 2] \)是饱和的,当且仅当它接受身份I使得不是置换身份和我的至少一侧没有重复的变量。然后我们表明,对角矩形带的变化是饱和的。最后,我们表明,posemigroup小号如果subposemigroup饱和\(S ^ N \) ,该产品的ñ的副本小号,饱和的正整数ñ

更新日期:2020-08-29
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