The product decomposition conjecture for twisted multivector fields

Let XX be a projective manifold, let LL be a numerically trivial line bundle, and let

vH0(X,qTXL)v \in H^0(X,\bigwedge^q T_X \otimes L)

be a non-zero section with q<dimXq<\dim X. A finite étale cover is a finite surjective morphism that is étale. The product decomposition conjecture. There exists a finite étale cover X~X\tilde X \to X such that X~Y×Z\tilde X \simeq Y \times Z, where YY is a projective manifold with trivial canonical bundle and vv is induced by a section vH0(Y,qTYL)v' \in H^0(Y,\bigwedge^q T_Y \otimes L'). This generalizes the known decomposition phenomenon for nowhere-vanishing vector fields, but the stated higher-rank version is open.

Sources & referencesView supporting material

Primary source

Thomas Peternell, “Generically nef vector bundles and geometric applications”, arXiv:1106.4241 (2011).

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