Betti numbers of chordal graphs and f-vectors of simplicial complexes
Betti numbers of chordal graphs and f-vectors of simplicial complexes
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DOI:
10.1016/j.jalgebra.2009.12.029
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发表时间:
2009-07
影响因子:
0.9
通讯作者:
T. Hibi;K. Kimura;S. Murai
中科院分区:
文献类型:
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作者:
T. Hibi;K. Kimura;S. Murai
Let G be a chordal graph and I(G) its edge ideal. Let β(I(G))=(β0,β1,…,βp) denote the Betti sequence of I(G), where βistands for the ith total Betti number of I(G) and where p is the projective dimension of I(G). It will be shown that there exists a simplicial complex Δ of dimension p whose f-vector f(Δ)=(f0,f1,…,fp) coincides with β(I(G)).