Why Is it So Hard to Count? (Videotaped Lecture)

By Doron Zeilberger

Delivered Aug. 14, 2010, at the Z60 Conference organized by the super-energetic leader of Chinese combinatorics Bill Chen held at the Center for Combinatorics, Nankai University, Tianjin, China.

Because of the size of the file (and the 1GB limit of Vimeo), the lecture is chopped into four parts. I thank the staff of the Center for Combinatorics for producing the video, and Edinah Gnang for editing and uploading.

Personal Journal of Ekhad and Zeilberger