On root posets for noncrystallographic root systems
On root posets for noncrystallographic root systems
复制标题
关于非晶体根系统的根偏序集
DOI:
10.1090/s0025-5718-2014-02841-x
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发表时间:
2012
期刊:
影响因子:
--
通讯作者:
Christian Stump
中科院分区:
文献类型:
--
作者:
M. Cuntz;Christian Stump
We discuss properties of root posets for finite crystallographic root systems, and show that these properties uniquely determine root posets for the noncrystallographic dihedral types and type $H_3$, while proving that there does not exist a poset satisfying all of the properties in type $H_4$. We do this by exhaustive computer searches for posets having these properties. We further give a realization of the poset of type $H_3$ as restricted roots of type $D_6$, and conjecture a Hilbert polynomial for the $q,t$-Catalan numbers for type $H_4$.