Combinatoriality of lattice sheaf cohomology vanishing

Let A\mathcal{A} be a hyperplane arrangement in a vector space of dimension \ell, let L0L_0 be its intersection lattice with the minimal element removed, and let D\mathscr{D} denote the lattice sheaf associated with the module of logarithmic vector fields. Lattice sheaf cohomology conjecture. The vanishing of the groups

Hn(L0,D)H^n(L_0,\mathscr{D})

for 0<n<10<n<\ell-1 depends only on the poset L0L_0. This is the reformulation of Terao's freeness conjecture given by the authors, connecting freeness to the cohomology of a sheaf on the intersection lattice. The parser supplies no resolution evidence, so the claim is recorded as open.

Sources & referencesView supporting material

Primary source

Paul Mücksch, “On Yuzvinsky's lattice sheaf cohomology for hyperplane arrangements”, arXiv:2008.13700 (2021).

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