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arXiv 2610.12486math.RAmath.GR
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固定阶数的所有半环生成的簇的有限基问题

The finite basis problem for varieties generated by all semirings of a fixed order

School of Mathematical Sciences, Chongqing University of Technology(重庆理工大学数学科学学院)

Aifa Wang, Lili Wang

AI总结:

本研究针对固定阶数的半环生成簇的有限基问题,证明两类特定半环簇有限基的充要条件,分析五阶情形的循环恒等式,且对多数阶数的ai-半环簇得出非有限基的相关结论。

摘要:

设$\Avar_n$和$\VV_n$分别为无常数的符号$(+,\cdot)$下,由所有$n$元加法幂等半环(ai-半环)和所有$n$元加法交换半环生成的簇。我们证明这两个簇有限基当且仅当$n\leq2$。五阶情形由循环恒等式及平方乘积的结构分析得出。对$n\geq6$,每个簇都包含一个有限的固有非有限基ai-半环。我们还对每个$n$证明了$\VV_n\cap\AI=\Avar_n$,其中$\AI$是所有ai-半环构成的簇。

英文摘要:

Let $\Avar_n$ and $\VV_n$ be the varieties generated by all $n$-element additively idempotent semirings (ai-semirings) and all $n$-element semirings with commutative addition, respectively, in the signature $(+,\cdot)$ without constants. We prove that both varieties are finitely based if and only if $n\leq2$. The five-element case follows from cyclic identities and a structural analysis of products of squares. For $n\geq6$, each variety contains a finite inherently nonfinitely based ai-semiring. We also prove $\VV_n\cap\AI=\Avar_n$ for every $n$, where $\AI$ is the variety of all ai-semirings.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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