Every rectangular semistandard Young tableau induces a positroidal subdivision of the hypersimplex, and for Gr(2,n) the non-frozen prime tableaux are exactly the coarsest such subdivisions.
Arkani-Hamed, T
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From dual canonical bases to positroidal subdivisions
Every rectangular semistandard Young tableau induces a positroidal subdivision of the hypersimplex, and for Gr(2,n) the non-frozen prime tableaux are exactly the coarsest such subdivisions.