The mathematician Paul Erdős had an Erdős number of 0. Anyone who has written a paper with Erdős has an Erdős number of 1. Anyone who writes a paper with someone having an Erdős number of 1 has an Erdős number of 2. And so on.

November 23, 2008
URL:http://www.drdobbs.com/architecture-and-design/the-dog-ate-my-homework/228700537

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