Wikipedia:Articles for deletion/Igor Pak
This is a no-brainer.  I'm a mathematician active in combinatorics.  Pak is an enormously important combinatorialist, who has important publications across different subareas of combinatorics.  I don't have hard data, but he's definitely cited much more than most mathematicians twice his age.  I think he clearly meets the criteria outlined in 
— User:Dkostic, 02:13, 4 January 2007 (UTC)
Stance: keep
Cited policy: WP:PROF (Wikipedia:Notability)