The simple-manifold decomposition conjecture

Let XnX_n be a simple compact Kähler manifold of dimension nn. A manifold is Kummer if it is bimeromorphic to a quotient of a complex compact torus by a finite group, and bimeromorphically irreducible symplectic if it is bimeromorphically symplectic with h2,0=1h^{2,0}=1.

Simple-manifold decomposition conjecture. XnX_n is either bimeromorphically irreducible symplectic or Kummer. In particular, XnX_n is Kummer if nn is odd.

This conjecture is used to identify simple compact Kähler manifolds in the conditional description of manifolds of algebraic dimension zero. Its status is not specified in the source.

Sources & referencesView supporting material

Primary source

Frederic Bruno Campana, “Bogomolov decomposition and compact Kähler manifolds of algebraic dimension zero”, arXiv:2605.19713 (2026).

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