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arXiv · 1204.2593

Bounding the volumes of singular Fano threefolds

Ching-Jui Lai
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Abstract

Let $(X,\Delta)$ be an $n$-dimensional $\epsilon$-klt log $\QQ$-Fano pair. We give an upper bound for the volume ${\rm Vol}(-(K_X+\Delta))=(-(K_X+\Delta))^n$ when $n=2$ or $n=3$ and $X$ is {$\QQ$-factorial} of $\rho(X)=1$. This bound is essentially sharp for $n=2$. Existence of an upper bound for anticanonical volumes is related the Borisov-Alexeev-Borisov Conjecture which asserts boundedness of the set of $\epsilon$-klt log $\QQ$-Fano varieties of a given dimension $n$.

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Ching-Jui Lai. 2012-04-12. Bounding the volumes of singular Fano threefolds. https://arxiv.org/abs/1204.2593

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