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arXiv 1708.04849math.CO
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根系芯片发射II:中央发射

Root system chip-firing II: Central-firing

Pavel Galashin, Sam Hopkins, Thomas McConville, Alexander Postnikov

摘要:

Jim Propp最近提出了一个在线切屑点火的标记版本,并证明了这个过程是从一些初始配置融合而来的。这是由Hopkins-McConville-Propp证明的。我们重新解释Propp的标记芯片发射移动的根系:一个“中心发射”移动包括取代重量$λ$为$λ+α$的任何正根$α$是正交的$λ$。我们证明了中心点火在经过外尔群修改后,从任何初始权重开始总是汇合的,从而将直线上的无标号芯片点火推广到其他类型。对于简单的根系,我们将这种未标记的切屑发射描述为Dynkin图上的数字游戏。我们还提供了一个从起源或基本重量的中心燃烧时汇合的结构分类。

英文摘要:

Jim Propp recently proposed a labeled version of chip-firing on a line and conjectured that this process is confluent from some initial configurations. This was proved by Hopkins-McConville-Propp. We reinterpret Propp's labeled chip-firing moves in terms of root systems: a "central-firing" move consists of replacing a weight $λ$ by $λ+α$ for any positive root $α$ that is orthogonal to $λ$. We show that central-firing is always confluent from any initial weight after modding out by the Weyl group, giving a generalization of unlabeled chip-firing on a line to other types. For simply-laced root systems we describe this unlabeled chip-firing as a number game on the Dynkin diagram. We also offer a conjectural classification of when central-firing is confluent from the origin or a fundamental weight.

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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