Erdoes-Number and List of Coauthors

Frank Stephan's Erdoes-Number is Three
Thanks to Bill Gasarch for finding this number. Paul Erdoes is one of the most productive mathematicians having more than 500 coaouthors. The Erdoes Number of a person A is computed as the length of the shortest path from Paul Erdoes to the person A with respect to the graph of co-authors of scientific articles. Frank Stephan's Erdoes number is 3 and witnessed by the following publications.

Paul Erdoes and Saharon Shelah: Separability properties of almost-disjoint families of sets. Israel Journal of Mathematics 12, 207-214 (1972).
Uri Abraham, Saharon Shelah and Robert Solovay: Squares with diamonds and Souslin trees with special squares. Fundamenta Mathematicae 127, 133-162 (1987).
Lance Fortnow, William Gasarch, Sanjay Jain, Efim Kinber, Martin Kummer, Stuart Kurtz, Mark Pleszkoch, Theodore Slaman, Robert Solovay and Frank Stephan: Extremes in the degrees of inferability. Annals of Pure and Applied Logic 66, 231-276 (1994).

Frank Stephan's Coauthors