Hochschild lattices and shuffle lattices
Research output: Contribution to journal › Research article › Contributed › peer-review
Contributors
Abstract
In his study of a Hochschild complex arising in connection with the free loop fibration, S. Saneblidze defined the freehedron, a certain polytope constructed via a truncation process from the hypercube. It was recently conjectured by F. Chapoton and proven by C. Combe that a certain orientation of the 1-skeleton of the freehedron carries a lattice structure. The resulting lattice was dubbed the Hochschild lattice and it is interval constructable and extremal. These properties allow for the definition of three associated structures: the Galois graph, the canonical join complex and the core label order. In this article, we study and characterize these structures. We exhibit an isomorphism from the core label order of the Hochschild lattice to a particular shuffle lattice of C. Greene. We also uncover an enumerative connection between the core label order of the Hochschild lattice, a certain order extension of its poset of irreducibles and the freehedron. These connections nicely parallel the situation surrounding the better-known Tamari lattices, noncrossing partition lattices and associahedra.
Details
Original language | English |
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Article number | 103521 |
Number of pages | 31 |
Journal | European Journal of Combinatorics |
Volume | 103 |
Publication status | Published - Jun 2022 |
Peer-reviewed | Yes |
External IDs
unpaywall | 10.1016/j.ejc.2022.103521 |
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WOS | 000784071300006 |
Keywords
DFG Classification of Subject Areas according to Review Boards
Subject groups, research areas, subject areas according to Destatis
ASJC Scopus subject areas
Keywords
- Complexes, Model