Erdos Number Project The Erdös Number Project studies research collaboration among mathematicians.
Grothendieck Circle Alexander Grothendieck: Bibliography of published texts, unpublished texts, photograph album.
In Memoriam Samuel Eilenberg (30 September 1913 —- 30 January 1998) remembered by Hyman Bass, Henri Cartan, Peter Freyd, Alex Heller and Saunders MacLane.
