Parameterized Clique on Scale-Free Networks

Parameterized Clique on Scale-Free Networks
复制标题

无标度网络上的参数化团

DOI:
--
复制
发表时间:
2012
期刊:
International Symposium on Algorithms and Computation
影响因子:
--
通讯作者:
Anton Krohmer
Anton Krohmer
中科院分区:
--
文献类型:
--
作者:
T. Friedrich;Anton Krohmer

文献摘要

被引文献

相似文献

在图中查找派系是一个经典问题,通常是 NP 困难且参数化的棘手问题。然而,在社交网络或蛋白质-蛋白质相互作用网络等典型应用中,所考虑的图是无标度的,即它们的度数序列遵循幂律。它们的特定结构可以通过算法加以利用,从而可以更有效地解决派系问题。我们证明,在具有 n 个节点和幂律指数 γ 的非齐次随机图上,对于 γ ≥ 3,可以在时间 \(\mathcal{O}(n^2)\) 中找到大小为 k 的团;对于 2 < γ < 3,可以在时间 \(\mathcal{O}(n\, \exp(k^4))\) 中找到大小为 k 的团。
Finding cliques in graphs is a classical problem which is in general NP-hard and parameterized intractable. However, in typical applications like social networks or protein-protein interaction networks, the considered graphs are scale-free, i.e., their degree sequence follows a power law. Their specific structure can be algorithmically exploited and makes it possible to solve clique much more efficiently. We prove that on inhomogeneous random graphs with n nodes and power law exponent γ, cliques of size k can be found in time \(\mathcal{O}(n^2)\) for γ ≥ 3 and in time \(\mathcal{O}(n\, \exp(k^4))\) for 2 < γ < 3.