Problem 13.2: Tutte's 4-Flow Conjecture
M. Kochol's disproof of Jaeger and Swart's conjecture, that any snark has
girth at most 6, has been published:
M. Kochol, Snarks without Small Cycles,
J. Combin. Theory Ser. B 67, 34-47, 1996.
August 1997, Tommy R. Jensen
Last modified August 28, 1997 Tommy R. Jensen