Optimistic conjecture for quotient EPW sextics

Let C\mathcal C be the class of varieties whose Chow rings admit the multiplicative bigrading described in Beauville's weak splitting problem. Let XX be an EPW sextic, meaning a special sextic XP5(C)X\subset\mathbb{P}^5(\mathbb{C}), and assume that XX is a quotient variety

X=X0/GX=X_0/G

with X0X_0 smooth and GAut(X0)G\subset\operatorname{Aut}(X_0) a finite group. Optimistic conjecture. Then XCX\in\mathcal C. This is motivated by the expected weak splitting behavior of Calabi–Yau and hyperkähler varieties and is open.

Sources & referencesView supporting material

Primary source

Robert Laterveer, “Algebraic cycles on a very special EPW sextic”, arXiv:1712.05982 (2017).

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