A combinatorial formula is given for the Euler characteristic of the Grassmannian with d hyperplane sections removed, with focus on generic cases, Schubert divisors, and both complex and real settings.
Lam: An invitation to positive geometries
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Develops positive geometry for del Pezzo surfaces and moduli spaces as very affine varieties, including canonical forms, scattering amplitudes, and likelihood equations.
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Hyperplane Arrangements in the Grassmannian
A combinatorial formula is given for the Euler characteristic of the Grassmannian with d hyperplane sections removed, with focus on generic cases, Schubert divisors, and both complex and real settings.