2 papers
math.CO2019
Bijections between directed animals, multisets and Grand-Dyck paths
Jean-Luc Baril, David Bevan, Sergey Kirgizov
An -multiset of consists of a set of elements from where each element can be repeated. We present the bivariate generating function for -mul…
math.CO2015
On the growth of permutation classes
David Bevan
We study aspects of the enumeration of permutation classes, sets of permutations closed downwards under the subpermutation order. First, we consider monotone grid classes of permut…