Bijections on Dyck tilings: DTS/DTR bijections, Dyck tableaux and tree-like tableaux

Abstract

Dyck tilings are certain tilings in the region surrounded by two Dyck paths. We study bijections and combinatorial objects bijective to Dyck tilings, which include Dyck tiling strip (DTS) and Dyck tiling ribbon (DTR) bijections, increasing and decreasing trees, Hermite histories, Dyck tableaux and tree-like tableaux. Dyck tableaux and tree-like tableaux are originally defined for a zigzag path, or equivalently a permutation. We generalize them to the case of general Dyck paths. We show that the most properties of Dyck tableaux can be generalized to the generic case, and show some enumerative results on generalized tree-like tableaux. We also show connections among DTS and DTR bijections, Hermite histories, involutions on increasing and decreasing trees and the reflection of Dyck tilings.