Nonredundant 1's in Gamma-Free Matrices
Nonredundant 1's in Gamma-Free Matrices
复制标题
无伽玛矩阵中的非冗余 1
DOI:
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发表时间:
1995
影响因子:
0.8
通讯作者:
J. Spinrad
中科院分区:
文献类型:
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作者:
J. Spinrad
This paper studies a new method for representing $\Gamma$-free matrices, which occur in characterizations of chordal bipartite and strongly chordal graphs. We show that the number of $\Gamma$-free matrices with $n$ rows and columns (and thus the number of chordal bipartite and strongly chordal graphs with $n$ vertices) is proportional to $2^\Theta(n \log^{2} n)$, and give an asymptotically space optimal method for storing these matrices.