Large Simple d-Cycles in Simplicial Complexes
Roy Meshulam, Ilan Newman, Yuri G. Rabinovich · arXiv (Cornell University) · 2019
We show that the size of the largest simple d-cycle in a simplicial d-complex $K$ is at least a square root of $K$'s density. This generalizes a well-known classical result of Erdős and Gallai \cite{EG59} for graphs. We use methods from matroid theory applied to combinatorial simplicial complexes.