Let M1,M2,...,Mn be 3-connected restrictions of a 3-connected matroid M on disjoint ground sets E1,E2,...,En, respectively. This paper proves that M has a 3-connected minor N that contains E1 UE2 U ··· UEn, has its restriction to each Ei, being Mi, and has at most 2n - 2 additional elements.
Publication Source (Journal or Book title)
Oxley, J. (1998). On packing 3-connected restrictions into 3-connected matroids. Discrete Mathematics, 178 (1-3), 181-198. https://doi.org/10.1016/S0012-365X(97)81826-2