Evaluating the Tutte Polynomial for Graphs of Bounded Tree-Width

Evaluating the Tutte Polynomial for Graphs of Bounded Tree-Width
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评估有界树宽度图的 Tutte 多项式

DOI:
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发表时间:
1998
期刊:
Combinatorics, probability & computing
影响因子:
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通讯作者:
S. Noble
S. Noble
中科院分区:
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文献类型:
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作者:
S. Noble

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众所周知,要计算一个图形 G 的 Tutte 多项式 T(G; x, y) 除了在 (x, y) 平面上的八个特定点和一条特定曲线外,在其他地方都是 #P 难的。相反,我们证明,如果 k 是一个固定常数,那么对于树宽最多为 k 的图,有一种算法只需线性的乘法和加法就能求得任意点的多项式。
It is known that evaluating the Tutte polynomial, T(G; x, y), of a graph, G, is #P-hard at all but eight specific points and one specific curve of the (x, y)-plane. In contrast we show that if k is a fixed constant then for graphs of tree-width at most k there is an algorithm that will evaluate the polynomial at any point using only a linear number of multiplications and additions.