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arXiv 1609.01460math.COmath.CTmath.RT
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Knuth关于A型格点幺半群的凝聚表示

Knuth's Coherent Presentations of Plactic Monoids of Type A

Nohra Hage, Philippe Malbos

摘要:

我们构造了A型plastic幺半群的有限凝聚表示。这种连贯的介绍表达了一个系统的发电机和关系的幺半群扩展在一个连贯的方式给家庭的发电机之间的关系。这种扩展表示用于表示么半群,特别是描述么半群在范畴上的作用。此外,一个连贯的介绍提供了第一步,在计算的一个范畴凝聚替换幺半群。我们的建设是基于由Squier介绍的重写方法,计算一个连贯的介绍,从收敛的。我们根据已知有限且收敛的列表示来计算弹性么半群的有限连贯表示。最后,我们将展示如何减少这种连贯的演示Tietze等效一个高德纳的发电机。

英文摘要:

We construct finite coherent presentations of plactic monoids of type A. Such coherent presentations express a system of generators and relations for the monoid extended in a coherent way to give a family of generators of the relations amongst the relations. Such extended presentations are used for representations of monoids, in particular, it is a way to describe actions of monoids on categories. Moreover, a coherent presentation provides the first step in the computation of a categorical cofibrant replacement of a monoid. Our construction is based on a rewriting method introduced by Squier that computes a coherent presentation from a convergent one. We compute a finite coherent presentation of a plactic monoid from its column presentation that is known to be finite and convergent. Finally, we show how to reduce this coherent presentation to a Tietze equivalent one having Knuth's generators.

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