Abstract
There are many long-standing open problems on cubic bridgeless graphs, for instance, Jaeger’s directed cycle double cover conjecture. On the other hand, many structural properties of braces have been recently discovered. In this work, we bijectively map the cubic bridgeless graphs to braces which we call the hexagon graphs, and explore the structure of hexagon graphs. We show that hexagon graphs are braces that can be generated from the ladder on 8 vertices using two types of McCuaig’s augmentations. In addition, we present a reformulation of Jaeger’s directed cycle double cover conjecture in the class of hexagon graphs.
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References
Jaeger, F.: A survey of the cycle double cover conjecture. In: Alspach, B.R., Godsil, C.D. (eds.) Annals of Discrete Mathematics 27 Cycles in Graphs, volume 115 of North-Holland Mathematics Studies, pp. 1 – 12. North-Holland (1985)
Jiménez, A., Loebl, M.: Directed cycle double covers: fork graphs. arXiv:1310.5539 (2013)
Jiménez, A., Loebl, M.: Directed cycle double covers and cut-obstacles. arXiv:1405.6929 (2014)
Kenyon, R.: The laplacian and dirac operators on critical planar graphs. Invent. Math. 150(2), 409–439 (2002)
Lovász, L.: Matching structure and the matching lattice. J. Comb. Theory Ser. B 43(2), 187–222 (1987)
Lovász, L., Plummer, M.D.: Matching Theory. Akadémiai Kiadó, Budapest. Also published as Vol. 121 of the North-Holland Mathematics Studies, North-Holland Publishing, Amsterdam (1986)
McCuaig, W.: Brace generation. J. Graph Theory 38(3), 124–169 (2001)
Mercat, C.: Discrete riemann surfaces and the ising model. Commun. Math. Phys. 218(1), 177–216 (2001)
Mohar, B., Thomassen, C.: Graphs on Surfaces. Johns Hopkins Studies in the Mathematical Sciences. Johns Hopkins University Press, Baltimore (MD), London (2001)
Zhang, C.-Q.: Integer Flows and Cycle Covers of Graphs. Marcel Dekker Inc, New York (1997)
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Andrea Jiménez partially supported by CONICYT: FONDECYT/POSTDOCTORADO 3150673, Núcleo Milenio Información y Coordinación en Redes ICM/FIC RC130003, Chile, FAPESP (Proc. 2013/03447-6) and CNPq (Proc. 456792/2014-7), Brazil. Mihyun Kang partially supported by the German Research Foundation KA 2748/2-1 and KA 2748/3-1). Martin Loebl partially supported by the Czech Science Foundation under the Contract Number P202-13-21988S.
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Jiménez, A., Kang, M. & Loebl, M. Cubic Bridgeless Graphs and Braces. Graphs and Combinatorics 32, 2473–2495 (2016). https://doi.org/10.1007/s00373-016-1722-y
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DOI: https://doi.org/10.1007/s00373-016-1722-y