Regular Decomposition of Large Graphs: Foundation of a Sampling Approach to Stochastic Block Model Fitting

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http://hdl.handle.net/10138/302672

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Reittu , H , Norros , I , Räty , T , Bolla , M & Bazsó , F 2019 , ' Regular Decomposition of Large Graphs: Foundation of a Sampling Approach to Stochastic Block Model Fitting ' , Data Science and Engineering , vol. 4 , no. 1 , pp. 44-60 . https://doi.org/10.1007/s41019-019-0084-x

Title: Regular Decomposition of Large Graphs: Foundation of a Sampling Approach to Stochastic Block Model Fitting
Author: Reittu, Hannu; Norros, Ilkka; Räty, Tomi; Bolla, Marianna; Bazsó, Fülöp
Contributor: University of Helsinki, Department of Mathematics and Statistics
Date: 2019-03-07
Language: eng
Number of pages: 17
Belongs to series: Data Science and Engineering
ISSN: 2364-1185
URI: http://hdl.handle.net/10138/302672
Abstract: We analyze the performance of regular decomposition, a method for compression of large and dense graphs. This method is inspired by Szemerédi’s regularity lemma (SRL), a generic structural result of large and dense graphs. In our method, stochastic block model (SBM) is used as a model in maximum likelihood fitting to find a regular structure similar to the one predicted by SRL. Another ingredient of our method is Rissanen’s minimum description length principle (MDL). We consider scaling of algorithms to extremely large size of graphs by sampling a small subgraph. We continue our previous work on the subject by proving some experimentally found claims. Our theoretical setting does not assume that the graph is generated from a SBM. The task is to find a SBM that is optimal for modeling the given graph in the sense of MDL. This assumption matches with real-life situations when no random generative model is appropriate. Our aim is to show that regular decomposition is a viable and robust method for large graphs emerging, say, in Big Data area.
Subject: 112 Statistics and probability
111 Mathematics
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