"Six degrees of separation" is the concept which was brought by Frigyes Karinthy. This conept was rediscoverd by Stanley Milgram, a Harvard professor. He did an experiment which proved this concept. The experiment was to find out how many acquaintances would it take to connect two randomly selected persons. The result of his experiment was that it took 5.5 persons to get to one selected persons from the other. This shows that our world is small.
Barabasi and other members did similar experiment on webs. The result was that any it took 18.59 documents to get to one selected documents to the other. This shows that the Web is a small world.
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