Root System Chip-Firing II: Central-Firing
Root System Chip-Firing II: Central-Firing
复制标题
根系统芯片点火 II:中央点火
DOI:
10.1093/imrn/rnz112
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发表时间:
2019
影响因子:
1
通讯作者:
Postnikov, Alexander
中科院分区:
文献类型:
--
作者:
Galashin, Pavel;Hopkins, Sam;McConville, Thomas;Postnikov, Alexander
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 weightbyfor any positive rootthat is orthogonal to. 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.
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