Edge-Contraction Problems
Edge-Contraction Problems
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DOI:
10.1016/0022-0000(83)90012-0
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发表时间:
1983-04
期刊:
影响因子:
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通讯作者:
Takao Asano;T. Hirata
中科院分区:
文献类型:
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作者:
Takao Asano;T. Hirata
For a property π on graphs, the corresponding edge-contraction problemPEC(π) is defined as follows: Given a graphG, find a set of edges of minimum cardinality whose contraction results in a graph satisfying property π. In this paper we show that the edge-contraction problemPEC(π) isNP-hard if π is hereditary on contractions and is determined by the biconnected components. Moreover, this problem isNP-hard even if we restrict ourselves to the class of planar graphs. Furthermore, if we add a condition that π is determined by the 3-connected components, thenPEC(π) isNP-hard even if restricted to 3-connected graphs and to bipartite graphs.