Strong liftability conjecture for cyclic covers over smooth projective toric varieties

Let XX be a smooth projective toric variety, and let L\mathcal L be an invertible sheaf on XX. Let NN be a positive integer prime to pp, and let DD be an effective divisor on XX such that

LN=OX(D)\mathcal L^N=\mathcal O_X(D)

and Sing(Dred)=\operatorname{Sing}(D_{\rm red})=\emptyset. Let π:YX\pi:Y\rightarrow X be the cyclic cover obtained by taking the NN-th root out of DD.

Strong liftability conjecture. The scheme YY is a smooth projective scheme which is strongly liftable over W2(k)W_2(k).

This conjecture proposes that the strong liftability result known for cyclic covers of projective spaces extends to cyclic covers over all smooth projective toric varieties. Ordinary liftability in this setting has already been proved, but strong liftability remains open in the supplied source.

Sources & referencesView supporting material

Primary source

Qihong Xie, “Cyclic Covers over Strongly Liftable Schemes”, arXiv:1401.3064 (2014).

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