User:LambdaBot

LambdaBot (λBot or ΛBot for short) is a work-in-progress bot that detects sockpuppetry.

Stylometry
We will use the Writeprints framework of for feature extraction. A feature matrix is a $$m$$-by-270 matrix, where $$m$$ is the number of authors.

Centrality
Centrality measures the importance of one vertex to a network. A vertex that has high centrality is a vital part of a network; removal would affect many vertices in terms of graph-theoric measures. We will use eigenvector centrality. Let $$A$$ be an adjacency matrix of our graph. Then we calculate the centrality vector $$\mathbf{c}$$ as the corresponding vector for the maximum eigenvalue of $$\mathbf{A}\mathbf{c} = \lambda\mathbf{c}$$.

Source
The source code is available at User:LambdaBot/Source.