Extends Lusztig total positivity to symmetric spaces G/K via Hausdorff closure, proves cell decomposition with positive parametrizations and subtraction-free transitions.
Karp, and Thomas Lam
2 Pith papers cite this work. Polarity classification is still indexing.
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Fence complexes are associated to positroid varieties, shown to be balls with matching Ehrhart and Hilbert polynomials, and positroid varieties degenerate to reduced unions of toric varieties corresponding to the complexes.
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Fence Complexes and Toric Degenerations of Positroid Varieties
Fence complexes are associated to positroid varieties, shown to be balls with matching Ehrhart and Hilbert polynomials, and positroid varieties degenerate to reduced unions of toric varieties corresponding to the complexes.