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On 14-04-2014 11:24, Loet Leydesdorff wrote:
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> Dear Marianna and Prabir:
> Diana Lucio-Arias & Loet Leydesdorff, Main-path analysis and
> path-dependent transitions in HistCite(tm)-based historiograms [1],
> _Journal of the American Society for Information Science and
> Technology _59(12), 1948-1962, 2008 <pdf-version [2]>; <software [3]>
> [4]
> Best,
> Loet

   Instead of main path I prefer to use critical path method (CPM).
   The main path method is based on a greedy heuristic while CPM 
   the path with the largest sum of all its weights.
   Another option is to determine the line island(s) - a subnetwork with
   the strongest links. It usually contains the main path and CPM path.

   best,   Vlado

Vladimir Batagelj
  University of Ljubljana, FMF, Department of Mathematics
  Jadranska 19, 1000 Ljubljana, Slovenia
  T: +386 1 4766 672

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