A large deviation principle for block models
A large deviation principle for block models
复制标题
块模型的大偏差原理
DOI:
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发表时间:
2020
期刊:
影响因子:
--
通讯作者:
S. Sen
中科院分区:
文献类型:
--
作者:
C. Borgs;J. Chayes;Julia Gaudio;Samantha Petti;S. Sen
We initiate a study of large deviations for block model random graphs in the dense regime. Following Chatterjee-Varadhan(2011), we establish an LDP for dense block models, viewed as random graphons. As an application of our result, we study upper tail large deviations for homomorphism densities of regular graphs. We identify the existence of a "symmetric" phase, where the graph, conditioned on the rare event, looks like a block model with the same block sizes as the generating graphon. In specific examples, we also identify the existence of a "symmetry breaking" regime, where the conditional structure is not a block model with compatible dimensions. This identifies a "reentrant phase transition" phenomenon for this problem---analogous to one established for Erdos-Renyi random graphs (Chatterjee-Dey(2010), Chatterjee-Varadhan(2011)). Finally, extending the analysis of Lubetzky-Zhao(2015), we identify the precise boundary between the symmetry and symmetry breaking regime for homomorphism densities of regular graphs and the operator norm on Erdos-Renyi bipartite graphs.
影响因子:
1
作者:
Liu, Yang P.;Zhao, Yufei
通讯作者:
Zhao, Yufei
影响因子:
1
作者:
Šileikis, Matas;Warnke, Lutz
通讯作者:
Warnke, Lutz