2 papers
math.CO2021
The combinatorics of a tree-like functional equation for connected chord diagrams
Lukas Nabergall
We build on recent work of Yeats, Courtiel, and others involving connected chord diagrams. We first derive from a Hopf-algebraic foundation a class of tree-like functional equation…
math.CO2018
Insertions Yielding Equivalent Double Occurrence Words
Daniel A. Cruz, Margherita Maria Ferrari, Natasa Jonoska +2
A double occurrence word (DOW) is a word in which every symbol appears exactly twice; two DOWs are equivalent if one is a symbol-to-symbol image of the other. We consider the so ca…