The EKR property for flag pure simplicial complexes without boundary
Combinatorics
2020-08-25 v2
Abstract
We prove that the family of facets of a pure simplicial complex of dimension up to three satisfies the Erd\H{o}s-Ko-Rado property whenever it is flag and has no boundary ridges. We conjecture the same to be true in arbitrary dimension and give evidence for this conjecture. Our motivation is that complexes with these two properties include flag pseudo-manifolds and cluster complexes.
Cite
@article{arxiv.1710.02518,
title = {The EKR property for flag pure simplicial complexes without boundary},
author = {Jorge Olarte and Francisco Santos and Jonathan Spreer and Christian Stump},
journal= {arXiv preprint arXiv:1710.02518},
year = {2020}
}
Comments
22 pages, v2: modified title and presentation, updated references, results unchanged