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Erdös number

Paul Erdös

A whimsical gauge of the connectedness of mathematicians, using as a starting point the work of the prolific Paul Erdös. Those who coauthored a paper with Erdös have an Erdös number of 1. Other mathematicians are assigned a number that is one more than the Erdös number of the mathematician with whom they have coauthored a paper who has the lowest Erdös number.

A list of the Erdös numbers of many living mathematicians is kept by Jerry Grossman at https://sites.google.com/oakland.edu/grossman/home/the-erdoes-number-project this link goes to another website .