On the 3-connected matroids that are minimal having a fixed spanning restriction
The authors consider the following problem: Let \(N\) be a restriction of a 3-connected matroid \(M\) and let \(M^\prime\) be a 3-connected minor of \(M\) that is minimal having \(N\) as a restriction. Find a sharp bound on \(|E(M')- E(N)|.\) They solve the problem in the case that \(E(N)\) spans \(M.\)
scientific article; zbMATH DE number 1453326