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An Excluded-Minor Problem in Matroids
S.R. Kingan1 and Manoel Lemos2
1Department of Mathematical and Computer Sciences, The Pennsylvania State University Capital College, Middletown,
PA 17057-4898, USA
2Departamento de Matematica, Universidade Federal de Pernambuco, Recife, Pernambuco 50740-540, Brazil
Annals of Combinatorics 9 (2) p.199-204 June, 2005
AMS Subject Classification: 05B35, 05C83
Consider the class of matroids M with the property that M is not isomorphic to a wheel graph, but has an element e such that both M \ e and M / e are isomorphic to a seriesparallel extension of a wheel graph. We give a constructive characterization of such matroids by determining explicitly the 3-connected members of the class. We also relate this problem with excluded minor problems.
Keywords: excluded minor, graph, matroid


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