The Hardness of Sampling Connected Subgraphs
The Hardness of Sampling Connected Subgraphs
复制标题
连通子图采样的难度
DOI:
10.1007/978-3-030-61792-9_37
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
Stefankovic, Daniel
中科院分区:
文献类型:
--
作者:
Read-McFarland, Andrew;Stefankovic, Daniel
We consider the problem of sampling connected induced subgraphs of a given input graphG. Our first result is that an efficient algorithm to approximately sample connected induced subgraphs of a given size (the size is specified in the input) does not exist unlessRP=NP. We then focus on the problem of approximately sampling connected induced subgraphs with a bias, more precisely we consider a distribution where the probability of a connected subgraph induced byis proportional to. When the input graphGhas maximum degreedwe identify a threshold. Forthere exists a trivial efficient sampler for the problem, and foran efficient approximate sampler does not exist unlessRP=NP. Finally, we show local Markov chains are unlikely to be effective at approximately sampling connected subgraphs.
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影响因子:
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通讯作者:
Regts, Guus
DOI:
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发表时间:
2017
期刊:
The Australasian Journal of Combinatorics
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期刊:
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2007
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期刊:
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