2 papers
math.CO2026
Counting Colored Trees
Stoyan Dimitrov, Nathan Fox, Kimberly Hadaway +2
We consider the enumeration of plane trees (rooted ordered trees) whose vertices are colored according to a specific coloring rule that prescribes which possible pairs of colors ca…
math.CO2025
Noncrossing arc diagrams of type B
Emily Barnard, Nathan Reading, Ashley M. Tharp
Noncrossing arc diagrams are combinatorial models for permutations that encode information about lattice congruences of the weak order and about the associated discrete geometry. I…