http://press.princeton.edu/blog/2011/01/04/pgs-dialogue-mircea-pitici-editor-of-the-best-writing-on-mathematics-2010/ Prof. Dr. Bulent Karasozen Middle East Technical University Department of Mathematics & Institute of Applied Mathematics 06531 Ankara, Turkey tel: + 90 312 2105653 fax: + 90 312 2102987