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math.AG2026
F-rationality of multiplicity-free subvarieties
Matt Larson
A multiplicity-free subvariety of a product of projective lines is a subvariety with the property that the expansion of its Chow class in the usual basis has all coefficients equal…
math.AG2026
Hodge theory for combinatorial projective bundles
Matt Larson, Ethan Partida
We prove the Hard Lefschetz theorem and Hodge-Riemann relations for certain rings which resemble the cohomology rings of projectivizations of globally generated vector bundles over…