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KDD 2020 | SEAL: Learning Heuristics for Community Detection with Generative Adversarial Networks

Accepted Papers

SEAL: Learning Heuristics for Community Detection with Generative Adversarial Networks

Yao Zhang: Fudan University; Yun Xiong: Fudan University; Yun Ye: Ant Financial Services Group; Tengfei Liu: Ant Financial Services Group; Weiqiang Wang: Ant Financial Services Group; Yangyong Zhu: Fudan University; Philip S. Yu: UIC


Community detection is an important task with many applications. However, there is no universal definition of communities, and a variety of algorithms have been proposed based on different assumptions. In this paper, we instead study the semi-supervised community detection problem where we are given several communities in a network as training data and aim to discover more communities. This setting makes it possible to learn concepts of communities from data without any prior knowledge. We propose the Seed Expansion with generative Adversarial Learning (SEAL), a framework for learning heuristics for community detection. SEAL contains a generative adversarial network, where the discriminator predicts whether a community is real or fake, and the generator generates communities that cheat the discriminator by implicitly fitting characteristics of real ones. The generator is a graph neural network specialized in sequential decision processes and gets trained by policy gradient. Moreover, a locator is proposed to avoid well-known free-rider effects by forming a dual learning task with the generator. Last but not least, a seed selector is utilized to provide promising seeds to the generator. We evaluate SEAL on 5 real-world networks and prove its effectiveness.

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