12 citations · 38 across the 15 of their papers we have counts for
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math.CO2004
The Redheffer matrix of a partially ordered set
Herbert S. Wilf
R. Redheffer described an matrix of 0's and 1's the size of whose determinant is connected to the Riemann Hypothesis. We describe the permutations that contribute to it…
math.CO2004★ 10 cited
The method of characteristics, and "problem 89" of Graham, Knuth and Patashnik
Herbert S. Wilf
We apply the method of characteristics for the solution of pde's to two combinatorial problems. The first is finding an explicit form for a distribution that arises in bio-informat…
math.CO2004★ 2 cited
Closed form summation of C-finite sequences
Curtis Greene, Herbert S. Wilf
We consider sums of the form \[\sum_{j=0}^{n-1}F_1(a_1n+b_1j+c_1)F_2(a_2n+b_2j+c_2)... F_k(a_kn+b_kj+c_k),\] in which each is a sequence that satisfies a linear recurr…