The enumeration of permutations avoiding 2143 and 4231
arXiv:1108.0989
Abstract
We enumerate the pattern class Av(2143,4231) and completely describe its permutations. The main tools are simple permutations and monotone grid classes.
arXiv:1108.0989
We enumerate the pattern class Av(2143,4231) and completely describe its permutations. The main tools are simple permutations and monotone grid classes.