Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. A number describing the degree of collaboration between a mathematician and Paul Erdős, defined such that a mathematician who has written a paper with Erdős has an Erdős number of 1, a mathematician who has written a paper with somebody having an Erdős number of 1 has an Erdős number of two, and so on.

Etymologies

Named for the Hungarian mathematician Paul Erdős. (Wiktionary)

Examples

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