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math.AG2025
On the Non-Semipositivity of a Nef and Big Line Bundle on Grauert's Example
Yangyang Zhang
We study the relation between semipositivity, nefness, and bigness of line bundles on compact Kähler manifolds. Every nef and big line bundle on a compact Kähler manifold is po…
math.AG2025
Symmetry notions for toric Fanos
Chenzi Jin, Yanir A. Rubinstein, Yang Zhang
We survey various notions of symmetry for toric varieties. These notions range from algebraic geometric, complex geometric, representation theoretic, combinatorial, convex geometri…