Let N be a minor of a 3-connected matroid M such that no proper 3-connected minor of M has N as a minor. This paper proves a bound on E(M)-E(N) that is sharp when N is connected. © 2003 Elsevier Ltd. All rights reserved.
Publication Source (Journal or Book title)
European Journal of Combinatorics
Lemos, M., & Oxley, J. (2003). On the minor-minimal 3-connected matroids having a fixed minor. European Journal of Combinatorics, 24 (8), 1097-1123. https://doi.org/10.1016/S0195-6698(03)00106-9