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math.CO2020
Realizable Sticky Matroid Conjecture
Jaeho Shin
We give a criterion for modular extension of rank-4 hypermodular matroids, and prove a weakening of Kantor's conjecture for rank-4 realizable matroids. This proves the sticky matro…
math.AG2020★ 1 cited
Biconvex Polytopes and Tropical Linear Spaces
Jaeho Shin
A biconvex polytope is a classical and tropical convex hull of finitely many points. Given a biconvex polytope, for each vertex of it we construct a directed bigraph and a gammoid…