arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2008.09904math.AC
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关于数值幺半群和Puix-Monoid的分子集

On the set of molecules of numerical and Puiseux monoids

Marly Gotti, Marcos M. Tirador

摘要:

$\mathbb{Q}_{\ge 0}$的加性子幺半群,也称为Puietrix幺半群,通常不是唯一因子分解幺半群(UFM)。事实上,唯一唯一的因式分解Puienix幺半群是由一个元素生成的。然而,即使一个Puironx幺半群不是UFM,它也可能包含具有恰好一个因子分解的非零元素。我们称这种元素为分子。分子最早是由W. Narkiewicz在代数数论的背景下。最近,F。Gotti和第一作者研究了Puietrix monoids背景下的分子。在这里,我们解决了一些方面的大小有关的套分子的各种子类的Puienix monoid与不同的原子行为。特别是,我们肯定地回答了以下最近实现猜想:对于每个$m \in \mathbb{N}_{\ge 2}$存在一个数值幺半群的一组分子,不是原子具有基数$m$。

英文摘要:

Additive submonoids of $\mathbb{Q}_{\ge 0}$, also known as Puiseux monoids, are not unique factorization monoids (UFMs) in general. Indeed, the only unique factorization Puiseux monoids are those generated by one element. However, even if a Puiseux monoid is not a UFM, it may contain nonzero elements having exactly one factorization. We call such elements molecules. Molecules were first investigated by W. Narkiewicz in the context of algebraic number theory. More recently, F. Gotti and the first author studied molecules in the context of Puiseux monoids. Here we address some aspects related to the size of the sets of molecules of various subclasses of Puiseux monoids with different atomic behaviors. In particular, we positively answer the following recent realization conjecture: for each $m \in \mathbb{N}_{\ge 2}$ there exists a numerical monoid whose set of molecules that are not atoms has cardinality $m$.

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