38 citations · 106 across the 18 of their papers we have counts for
Showing 2011 · math.COShow all
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math.CO2011
On the relative importance of excluded minors
Rhiannon Hall, Dillon Mayhew, Stefan H. M. van Zwam
If EE is a set of matroids, then ex(EE) denotes the set of matroids that have no minor isomorphic to a member of EE. If EE' is a subset of EE, we say that EE' is /superfluous/ if e…
math.CO2011
Matroid 3-connectivity and branch width
Jim Geelen, Stefan H. M. van Zwam
We prove that, for each nonnegative integer k and each matroid N, if M is a 3-connected matroid containing N as a minor, and the the branch width of M is sufficiently large, then t…
math.CO2011★ 21 cited
Representing some non-representable matroids
R. A. Pendavingh, S. H. M. van Zwam
We extend the notion of representation of a matroid to algebraic structures that we call skew partial fields. Our definition of such representations extends Tutte's definition, usi…