3 papers
math.CO2005
Conway's napkin problem
Anders Claesson, T. Kyle Petersen
The napkin problem was first posed by John H. Conway, and written up as a `toughie' in "Mathematical Puzzles: A Connoisseur's Collection," by Peter Winkler. To paraphrase Winkler's…
math.CO2001
Counting occurrences of a pattern of type (1,2) or (2,1) in permutations
Anders Claesson, Toufik Mansour
Babson and Steingr\'ımsson introduced generalized permutation patterns that allow the requirement that two adjacent letters in a pattern must be adjacent in the permutation. Claess…
math.CO2000
Generalised Pattern Avoidance
Anders Claesson
Recently, Babson and Steingrimsson have introduced generalised permutation patterns that allow the requirement that two adjacent letters in a pattern must be adjacent in the permut…