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Sorry to hear that Herbert Wilf has passed away

http://www.jewishexponent.com/article/25135/Herbert_S_Wilf_80_Mathematics/

http://www.math.upenn.edu/History/obits/Herb_Wilf.html

What I've read of his books has been very instructional, and I expect that I'll be learning more from them for years to come:

http://hans.math.upenn.edu/~wilf/

http://www.jewishexponent.com/article/25135/Herbert_S_Wilf_80_Mathematics/

http://www.math.upenn.edu/History/obits/Herb_Wilf.html

What I've read of his books has been very instructional, and I expect that I'll be learning more from them for years to come:

http://hans.math.upenn.edu/~wilf/

- "There are two ways to proceed: (a) look it up (b) work it out. To work it out we use the following stunt, which seems artificial if you haven't seen it before, but after using it 4993 times it will seem quite routine." — generatingfunctionologyJan 29, 2012
- Among Wilf's other accomplishments, he co-founded the Journal of Algorithms with Knuth, and convinced Doron Zeilberger to become a combinatorialist.Jan 30, 2012