Paper Notes: Near linear time algorithm to detect community structures in large-scale networks
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Paper title: Near linear time algorithm to detect community structures in large-scale networks
Author: UN Raghavan, R Albert, S Kumara
Year: 2007
Journal: Physical Review
My notes:
This paper adopts the idea of label propagation in networks to find the community structure. Each node is first initialized with a unique label and then in each iterative process every node adopts the label that most of its neighbors have.
The algorithm has synchronous and asynchronous versions according to two different label updating strategies. But synchronous method will lead to a label oscillation problem particularly in networks having bi-partite or nearly bi-partite structure. Thus asynchronous versions are used in this paper.
Validations are performed on 6 networks:
The time complexity of the label propagation algorithm is near linear. Initialization takes O(n) time and each iteration of label propagation takes linear time O(m) ( n is the number of node and m is the number of edges in the network).
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