Ekhad's Geometry WebBook
Ekhad's Alphametics WebBook
Ekhad's Connect-Four End-Game WebBook
Ekhad's Pic-a-Pix Problems WebBook

Lara's Permutation WebBook

Dr. Z's Crystal Clear Calculus Handouts   (2nd ed.)

WZ in 10 mins. (by A. Tefera)

1998 lecture    2008 lecture    Krasnoyarsk lectures(May 2009, produced by Maxim Davletshin).     H. Wilf talks to Sister Celine (1993)     March 22, 2010 Lecture (produced by Edinah Gnang)

3x+1 (produced by Mike McKenna and Marc Heft)
Aug. 14, 2010 Lecture (Z=60 Nankai)     Sept. 16, 2010 Lecture (produced by Edinah Gnang)

Z=60-ε       (slide-show   W's tribute   D. Foata's poem   gp portrait )          Z=60-ε²             Z=60+ε

ס י נ ד ר ו ם   א מ נ ד ה   פ ו ל ס ו ם     ה ש ו פ ט   ב ן   ז ו נ ה

Biological Family