Decomposition conjecture for compact Fujiki manifolds with vanishing first Chern class
Decomposition conjecture for compact Fujiki manifolds with vanishing first Chern class
Let be a compact Fujiki manifold such that . A finite étale cover of is a finite étale morphism . An irreducible Calabi–Yau manifold and an irreducible holomorphic symplectic manifold are the factors specified below; an ICY variety is a variety with trivial canonical class in the intended sense of the source, and terminal singularities are understood in the standard birational-geometric sense. The conjecture asserts that there is a finite étale cover and a decomposition
Here is a complex torus, each is an irreducible Calabi–Yau manifold, and each is an irreducible holomorphic symplectic manifold. Moreover, there are bimeromorphic maps and , isomorphic in codimension one, such that each is a projective ICY variety with terminal singularities and each is a Kähler IHS variety with terminal singularities.
Decomposition Conjecture. Every compact Fujiki manifold with vanishing first Chern class admits such a finite étale cover and decomposition, together with the stated bimeromorphic models.
This proposes a Beauville–Bogomolov-type decomposition for compact Fujiki manifolds with vanishing first Chern class, extending the classical decomposition theorem beyond the Kähler setting. The parser supplies no resolution evidence, so the conjecture is recorded as open; the precise definitions of the Calabi–Yau, ICY, and IHS terminology should be checked against the paper.
Sources & referencesView supporting material
Primary source
Indranil Biswas, Junyan Cao, Sorin Dumitrescu and Henri Guenancia, “Geometry of K-trivial Moishezon manifolds : decomposition theorem and holomorphic geometric structures”, arXiv:2306.16729 (2024).
Progress summary
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