Hodge-Witt symmetry conjecture for liftable varieties

Let X/kX/k be a smooth, proper variety over a perfect field. Assume that XX lifts to W2W_2 and that the crystalline cohomology of XX is torsion free. For all i,ji,j, let Ti,jT^{i,j} be the dimension of the domino associated to the differential

d:Hj(X,WΩi)Hj(X,WΩj+1).d:H^j(X,W\Omega^i)\to H^j(X,W\Omega^{j+1}).

Hodge-Witt symmetry conjecture. The variety XX satisfies Hodge-Witt symmetry. In particular, Ekedahl's conditions hold:

Ti,j=Tj2,i+2.T^{i,j}=T^{j-2,i+2}.

The conjecture proposes Hodge-Witt symmetry under a W2W_2-lifting and torsion-freeness hypothesis; the source presents it as a precise conjectural statement and gives no resolution.

Sources & referencesView supporting material

Primary source

Kirti Joshi, “Some remarks on Hodge symmetry”, arXiv:1402.4176 (2014).

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