Hochschild polytopes
Abstract
The -multiplihedron is a polytope whose faces correspond to -painted -trees, and whose oriented skeleton is the Hasse diagram of the rotation lattice on binary -painted -trees. Deleting certain inequalities from the facet description of the -multiplihedron, we construct the -Hochschild polytope whose faces correspond to -lighted -shades, and whose oriented skeleton is the Hasse diagram of the rotation lattice on unary -lighted -shades. Moreover, there is a natural shadow map from -painted -trees to -lighted -shades, which turns out to define a meet semilattice morphism of rotation lattices. In particular, when , our Hochschild polytope is a deformed permutahedron whose oriented skeleton is the Hasse diagram of the Hochschild lattice.
Keywords
Cite
@article{arxiv.2307.05940,
title = {Hochschild polytopes},
author = {Vincent Pilaud and Daria Poliakova},
journal= {arXiv preprint arXiv:2307.05940},
year = {2025}
}
Comments
35 pages, 28 figures, 7 tables. Version 5: minor corrections