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math.AG2023
On finite categories of algebraic varieties
Junho Peter Whang
We prove that the finiteness of a finitely generated category of irreducible algebraic varieties over a field of characteristic zero is decidable. We also obtain a Burnside finiten…
math.AG2020
Surfaces, braids, Stokes matrices, and points on spheres
Yu-Wei Fan, Junho Peter Whang
Moduli spaces of points on -spheres carry natural actions of braid groups. For , , and , we prove that these symmetries extend to actions of mapping class groups of p…