Vertex-Weighted Graphs and Freeness of ψ -Graphical Arrangements
Vertex-Weighted Graphs and Freeness of ψ -Graphical Arrangements
复制标题
顶点加权图和 ψ 的自由度 - 图形排列
DOI:
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发表时间:
2018
期刊:
影响因子:
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通讯作者:
S. Tsujie
中科院分区:
文献类型:
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作者:
D. Suyama;S. Tsujie
Let G be a simple graph on (cid:2) vertices { 1 , . . . , (cid:2) } with edge set E G . The graphical arrangement A G consists of hyperplanes { x i − x j = 0 } , where { i , j } ∈ E G . It is well known that three properties, chordality of G , supersolvability of A G , and freeness of A G are equivalent. Recently, Stanley introduced ψ -graphical arrangement A G ,ψ as a generalization of graphical arrangements. Mu and Stanley characterized the supersolvability of the ψ -graphical arrangements and conjectured that the freeness and the supersolvability of ψ -graphical arrangements are equivalent. In this paper, we will prove the conjecture.
DOI:
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发表时间:
2009
期刊:
Journal of the London Mathemathcal Society
影响因子:
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作者:
Takuro Abe;Koji Nuida and Yasuhide Numata
通讯作者:
Koji Nuida and Yasuhide Numata