Enumerating Restricted Dyck Paths with Context-Free Grammars
Combinatorics
2020-09-22 v1
Abstract
The number of Dyck paths of semilength is famously , the th Catalan number. This fact follows after noticing that every Dyck path can be uniquely parsed according to a context-free grammar. In a recent paper, Zeilberger showed that many restricted sets of Dyck paths satisfy different, more complicated grammars, and from this derived various generating function identities. We take this further, highlighting some combinatorial results about Dyck paths obtained via grammatical proof and generalizing some of Zeilberger's grammars to infinite families.
Keywords
Cite
@article{arxiv.2009.09061,
title = {Enumerating Restricted Dyck Paths with Context-Free Grammars},
author = {AJ Bu and Robert Dougherty-Bliss},
journal= {arXiv preprint arXiv:2009.09061},
year = {2020}
}