Sign variation, the Grassmannian, and total positivity

zbMATH Open1335.05220MaRDI QIDQ2803283

Steven N. Karp

Publication date: 4 May 2016

zbMATH Keywords

oriented matroidpositroidsign variationtotally nonnegative GrassmannianGrassmann necklace

Mathematics Subject Classification ID

Matroids in convex geometry (realizations in the context of convex polytopes, convexity in combinatorial structures, etc.) (52B40) Grassmannians, Schubert varieties, flag manifolds (14M15) Combinatorial aspects of matroids and geometric lattices (05B35)

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