arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2001.07601math.GR
收藏

具有复子簇格的幺半群簇

Varieties of monoids with complex lattices of subvarieties

Sergey V. Gusev, Edmond W. H. Lee

摘要:

如果一个簇的子簇的格包含每个有限格的同构副本,则该簇是半泛簇。自1970年代初以来,半群的泛泛簇的例子已经存在,但不知道是否存在幺半群的泛泛簇。本文的主要目的是展示幺半群的第一个泛变种的例子。这些品种的有限的普遍性是建立在显示的格的等价关系的每一个足够大的有限集是反同构的一些子区间格的子品种。

英文摘要:

A variety is finitely universal if its lattice of subvarieties contains an isomorphic copy of every finite lattice. Examples of finitely universal varieties of semigroups have been available since the early 1970s, but it is unknown if there exists a finitely universal variety of monoids. The main objective of the present article is to exhibit the first examples of finitely universal varieties of monoids. The finite universality of these varieties is established by showing that the lattice of equivalence relations on every sufficiently large finite set is anti-isomorphic to some subinterval of the lattice of subvarieties.

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。

↑