Numerical Semigroups, Polyhedra, and Posets III: Minimal Presentations and Face Dimension
Numerical Semigroups, Polyhedra, and Posets III: Minimal Presentations and Face Dimension
复制标题
数值半群、多面体和偏序集 III:最小表示和面维数
DOI:
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发表时间:
2020
影响因子:
0.7
通讯作者:
Eduardo Torres Davila
中科院分区:
文献类型:
--
作者:
Tara Gomes;C. O’Neill;Eduardo Torres Davila
This paper is the third in a series of manuscripts that examine the combinatorics of the Kunz polyhedron $P_m$, whose positive integer points are in bijection with numerical semigroups (cofinite subsemigroups of $mathbb Z_{ge 0}$) whose smallest positive element is $m$. The faces of $P_m$ are indexed by a family of finite posets (called Kunz posets) obtained from the divisibility posets of the numerical semigroups lying on a given face. In this paper, we characterize to what extent the minimal presentation of a numerical semigroup can be recovered from its Kunz poset. In doing so, we prove that all numerical semigroups lying on the interior of a given face of $P_m$ have identical minimal presentation cardinality, and we provide a combinatorial method of obtaining the dimension of a face from its corresponding Kunz poset.
DOI:
10.5070/c61055385
发表时间:
2021
期刊:
Combinatorial Theory
影响因子:
--
作者:
Kaplan, Nathan;O'Neill, Christopher
通讯作者:
O'Neill, Christopher