A cycle of a matroid is a disjoint union of circuits. A cycle C of a matroidM is spanning if the rank of C equals the rank ofM . Settling an open problem of Bauer in 1985, Catlin in [P.A. Catlin, A reduction method to find spanning Eulerian subgraphs, J. Graph Theory 12 (1988) 29–44] showed that if G is a 2-connected graph on n > 16 vertices, and if δ(G) > n 5−1, thenGhas a spanning cycle. Catl...
