Interacting Individuals Leading to Zipf's Law

Institut de Physique Th´eorique, Universit´e de Fribourg, CH-1700(February 1, 2008)We present a general approach to explain the Zipf’s law of city distribution. If the simplestinteraction (pairwise) is assumed, individuals tend to form cities in agreement with the well-knownstatisticsPACS numbers: 89.50.+r, 05.20.-y, 05.40.+j