English

Matroids with different configurations and the same $\mathcal{G}$-invariant

Combinatorics 2024-08-07 v2

Abstract

From the configuration of a matroid (which records the size and rank of the cyclic flats and the containments among them, but not the sets), one can compute several much-studied matroid invariants, including the Tutte polynomial and a newer, stronger invariant, the G\mathcal{G}-invariant. To gauge how much additional information the configuration contains compared to these invariants, it is of interest to have methods for constructing matroids with different configurations but the same G\mathcal{G}-invariant. We offer several such constructions along with tools for developing more.

Keywords

Cite

@article{arxiv.2108.05482,
  title  = {Matroids with different configurations and the same $\mathcal{G}$-invariant},
  author = {Joseph E. Bonin},
  journal= {arXiv preprint arXiv:2108.05482},
  year   = {2024}
}

Comments

15 pages, 3 figures

R2 v1 2026-06-24T05:02:55.373Z