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COMBINATORICS
2004
105views more  COMBINATORICS 2004»
13 years 4 months ago
An Answer to a Question by Wilf on Packing Distinct Patterns in a Permutation
We present a class of permutations for which the number of distinctly ordered subsequences of each permutation approaches an almost optimal value as the length of the permutation ...
Micah Coleman
CPC
2000
58views more  CPC 2000»
13 years 4 months ago
Packing Ferrers Shapes
Answering a question of Wilf, we show that if n is sufficiently large, then one cannot cover an n
Noga Alon, Miklós Bóna, Joel Spencer