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math.CO2016★ 1 cited
The excluded minors for the class of matroids that are graphic or bicircular lift
Rong Chen
Bicircular lift matroids are a class of matroids defined on the edge set of a graph. For a given graph , the circuits of its bicircular lift matroid are the edge sets of…
math.CO2016★ 1 cited
On recognising frame and lifted-graphic matroids
Rong Chen, Geoff Whittle
We prove that there is no polynomial with the property that a matroid can be determined to be either a lifted-graphic or frame matroid using at most rank ev…