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On Certain Cross Varieties of Aperiodic Monoids with Commuting Idempotents

机译:关于带有通勤幂等的非周期性半边形的某些交叉变体

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摘要

Let A(com) denote the class of aperiodic monoids with commuting idempotents. It is shown that any subvariety of A(com) that satisfies the identity x(2)yx approximate to xyx(2) is Cross if and only if it excludes the almost Cross varieties J(1), J(2), L. Consequently, these three almost Cross varieties are unique among all subvarieties A(com) of that satisfy the identity x(2)yx approximate to xyx(2). On the other hand, the existence of A(com) almost Cross subvarieties of different from J(1), J(2), and L is also established.
机译:令A(com)表示具有换向幂等的非周期性类曲面。结果表明,当且仅当A(com)满足几乎等于Cross品种J(1),J(2),L时,满足标识x(2)yx近似于xyx(2)的A(com)的任何子品种才是Cross。因此,这三个几乎交叉的变体在满足相同性x(2)yx近似于xyx(2)的所有子变体A(com)中都是唯一的。另一方面,还建立了A(com)与J(1),J(2)和L不同的几乎Cross子变量的存在。

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