Petersen family minors
The Petersen family consists of the seven graphs obtained from \(K_6\) by \(Y- \Delta\) and \(\Delta- Y\) exchanges. The paper, which serves as preparation for the proof of Sachs' linkless embedding conjecture (same authors [J. Comb. Theory, Ser. B 64, 185-227 (1995; Zbl 0832.05032)]), characterizes the class of graphs with no Petersen family minor.
scientific article; zbMATH DE number 798746