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- W2822620120 abstract "The tendency of k-nearest neighbor graphs constructed from tabular data using some distance measure to contain hubs, i.e. points with in-degree much higher than expected, has drawn a fair amount of attention in recent years due to the observed impact on techniques used in many application domains. This companion paper will summarize the tutorial organized in three parts: (1) Origins, which will discuss the causes of the emergence of hubs (and their low in-degree counterparts, the anti-hubs), and their relationships with dimensionality, neighborhood size, distance concentration, and the notion of centrality; (2) Applications, where we will present some notable effects of (anti-)hubs on techniques for machine learning, data mining and information retrieval, identify two different approaches to handling hubs adopted by researchers -- through fighting or embracing their existence -- and review techniques and applications belonging to the two groups; and (3) Challenges, which will discuss work in progress, open problems, and areas with significant opportunities for hub-related research." @default.
- W2822620120 created "2018-07-19" @default.
- W2822620120 creator A5025192310 @default.
- W2822620120 date "2018-06-25" @default.
- W2822620120 modified "2023-09-24" @default.
- W2822620120 title "Hubs in Nearest-Neighbor Graphs" @default.
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- W2822620120 doi "https://doi.org/10.1145/3227609.3227691" @default.
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