The Negativity Conjecture for smooth Q\mathbb{Q}-acyclic surfaces

Let SS be a smooth Q\mathbb{Q}-acyclic surface, and let (X,D)(X,D) be a log smooth completion of SS. Here, KXK_X is the canonical divisor of XX, DD is the boundary divisor, and κ\kappa denotes the Kodaira--Iitaka dimension. Negativity Conjecture. One has

κ(KX+12D)=.\kappa\left(K_X+\frac{1}{2}D\right)=-\infty.

This formulation is presented as the guiding principle for studying smooth Q\mathbb{Q}-acyclic surfaces through the almost Minimal Model Program. The supplied text gives no evidence that the conjecture has been resolved.

Sources & referencesView supporting material

Primary source

Karol Palka and Tomasz Pełka, “Classification of planar rational cuspidal curves. II. Log del Pezzo models”, arXiv:1810.08180 (2019).

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