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Showing 2018 · math.COShow all
3 papers · 2 filters
math.CO2018
The excluded 3-minors for vf-safe delta-matroids
Joseph E Bonin, Carolyn Chun, Steven D Noble
Vf-safe delta-matroids have the desirable property of behaving well under certain duality operations. Several important classes of delta-matroids are known to be vf-safe, including…
math.CO2018★ 6 cited
Delta-matroids as subsystems of sequences of Higgs lifts
Joseph E Bonin, Carolyn Chun, Steven D Noble
In her paper "Generalized matroids and supermodular colourings", Tardos studied special delta-matroids obtained from sequences of Higgs lifts; these are the full Higgs lift delta-m…
math.CO2018★ 5 cited
An affine generalization of evacuation
M. Chmutov, G. Frieden, D. Kim +2
We establish the existence of an involution on tabloids that is analogous to Schutzenberger's evacuation map on standard Young tableaux. We find that the number of its fixed points…