The joint publication by Wilf and Zeilberger of Rational functions certify combinatorial identities in 1990 led to them being awarded the Steele Prize by the American Mathematical Society . Donald Knuth read the Wilf and Zeilberger paper and was extremely impressed.
Ang pinagsamang publikasyon sa pamamagitan ng Wilf at Zeilberger ng katuwiran function patunayan kombinatoryal pagkakakilanlan sa 1990 na humantong sa mga ito ay iginawad sa Steele Prize ng Amerikanong matematiko Society. Donald Knuth basahin ang Wilf at Zeilberger papel at noon ay balisang-impressed.