mathematics, a vexillary permutation is a permutation μ of the positive integers containing no subpermutation isomorphic to the permutation (2143); in other...

Vexillary may refer to: an adjective meaning "flag-like" the carrier of a Roman vexillum Vexillary permutation in mathematics This disambiguation page...

exactly the permutations that do not have 321, 2143, and 2413 as patterns. Thus, for instance, they are a subclass of the vexillary permutations, which have...

polynomials, as well as novel terminology like the plactic monoid and vexillary permutations. They were also the first to define the crystal graph structure...

survey of Motzkin numbers. Guibert, Pergola & Pinzani (2001) showed that vexillary involutions are enumerated by Motzkin numbers. Telephone number which...