The permuto-associahedron revisited
The permuto-associahedron revisited
复制标题
重新审视排列关联面体
DOI:
10.1016/j.ejc.2023.103706
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发表时间:
2023
影响因子:
1
通讯作者:
Liu, Fu
中科院分区:
文献类型:
--
作者:
Castillo, Federico;Liu, Fu
A classic problem connecting algebraic and geometric combinatorics is the realization problem: given a poset, determine whether there exists a polytope whose face lattice is the poset. In 1990s, Kapranov defined a poset as a hybrid between the face poset of a permutohedron and that of an associahedron, and he asked whether this poset is realizable. Shortly after his question was posed, Reiner and Ziegler provided a realization. Based on our previous work on the nested braid fan, we provide in this paper a different realization of Kapranov’s poset by constructing the vertex set and the normal fan of a permuto-associahedron simultaneously.
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