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COMPUTER
2010
86views more  COMPUTER 2010»
13 years 10 months ago
Letters to the Editor
DB
2008
69views more  DB 2008»
13 years 10 months ago
Letter from the chair
Janice C. Sipior, Diane Lending, Donald L. Amoroso...
DB
2008
85views more  DB 2008»
13 years 10 months ago
Letter from the editors
Tom Stafford, Patrick Y. K. Chau
DM
2008
61views more  DM 2008»
13 years 10 months ago
Wilf classification of three and four letter signed patterns
We give some new Wilf equivalences for signed patterns which allow the complete classification of signed patterns of lengths three and four. The problem is considered for pattern a...
W. M. B. Dukes, Toufik Mansour, Astrid Reifegerste
COMBINATORICS
2006
137views more  COMBINATORICS 2006»
13 years 9 months ago
Three-Letter-Pattern-Avoiding Permutations and Functional Equations
We present an algorithm for finding a system of recurrence relations for the number of permutations of length n that satisfy a certain set of conditions. A rewriting of these rela...
Ghassan Firro, Toufik Mansour