Hierarchical organization of large integrated systems

Feb 23, 2011, 4:30 PM
FB52 (AlbaNova Main Building)


AlbaNova Main Building


Martin Rosvall (Umeå University)


Ever since Aristotle, organization and classification have been cornerstones of science. In network science, categorization of nodes into modules with community-detection algorithms has proven indispensable to comprehending the structure of large integrated systems. But in real-world networks, the organization rarely is limited to two levels, and modular descriptions can only provide cross sections of much richer structures. For example, both biological and social systems are often characterized by hierarchical organization with submodules in modules over multiple scales. In many real-world networks, directed and weighted links represent the constraints that the structure of a network places on dynamical processes taking place on this network. Networks thus often represent literal or metaphorical flows: people surfing the web, passengers traveling between airports, ideas spreading between scientists, funds passing between banks, and so on. This flow through a system makes its components interdependent to varying extents. In my talk, I will present our information-theoretic approach to reveal the multiple levels of interdependences between the nodes of a network.

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