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Wednesday, September 10, 2008
3:00 PM - 4:00 PM
CNLS Conference Room (TA-3, Bldg 1690)

Seminar

Heirarchical Structure and the Prediction of Missing Links in Networks

Cristopher Moore
Professor Computer Science, Physics and Astronomy, UNM and the Santa Fe Institute

Networks often exhibit hierarchical organization, where vertices divide into groups that further subdivide into groups of groups, and so on over multiple scales. I will present a general technique for inferring hierarchical structure from observed network data. This technique lets us automatically develop a large-scale summary of a network's structure; it lets us create new benchmark networks which are random,but whose statistical properties are similar to the observed one; and it lets us predict missing connections in partially known-networks with high accuracy, and for more general network structures than competing techniques.

This is joint work with Aaron Clauset and Mark Newman; the paper appeared in Nature 453, pp. 98--101 (2008).

Contact Ron Pistone (pistone@lanl.gov) if you wish to meet with Cris during the day to discuss ideas for collaboration.

Host: Garrett Kenyon, Applied Modern Physics (P-21)