Exystence Workshop ComplexityScience.org
Vienna September 2004

A printout of the slides of my talk "The recent network-hype in physics" (PDF, 350 kB)

Some links and answers to questions:

• small-world collaboration networks:
  • movie-actor-network: Bacon number 
  • publications in mathematics: Erdös number 
     
• community clustering:
  • paper by Newman: cond-mat/0308217
     
  • community clustering can also be done with an Ising/Potts model: 
    • q=2 kind of spins/colours (or bigger q with Potts model) 
    • are put on each (lattice) node, 
    • energy is lowered when 2 neighbouring spins are aligned
    • then spin flips are done (a) if flipping lowers the energy or 
      (b) on random tuned by an (external) temperature (high temp: a lot of flipping)
    • example applet to play around with

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