Paul Erdős's number is 0. Anyone who directly worked with Paul Erdős has an Erdős number of 1. Anyone who works with those collaborators who have an Erdős number of 1, has an Erdős number of 2. The chain continues like that.
Other websites[change | change source]
- Jerry Grossman, The Erdös Number Project. Contains statistics and a complete list of all mathematicians with an Erdős number less than or equal to 2.
- Erdős number project