## Permutations Generated by a Depth 2 Stack and an Infinite Stack in Series are Algebraic

- Murray Elder, Geoffrey Lee, Andrew Rechnitzer
- Electr. J. Comb.
- 2015

Classes of permutations are sets of permutations that are closed downwards under taking subpermutations. They are usually presented as sets C that avoid a given set B of permutations (i.e. the permutations of C have no subpermutation in the set B). We express this by the notation C = Av(B). Much of the inspiration for elucidating the structure of pattern… (More)