Let \(G\) be the circuit graph of any connected matroid. It is proved that the circuit graph of a connected matroid with at least three circuits is \(E_2\)-Hamiltonian.
Citation
Hao Fan , Guizhen Liu. The \(E_2\)-Hamiltonian Property of Circuit Graphs of Matroids[J], Ars Combinatoria, Volume 113. 299-305. .