Campana rational connectedness and weak approximation
Campana introduced a notion of Campana rational connectedness for Campana orbifolds.Given a Campana fibration over a complex curve, we prove that a version of weak approximation for Campana sections holds at places of good reduction when the general fiber satisfies a slightly stronger version of Campana rational connectedness.Campana also conjectured that any Fano orbifold is Campana rationally connected; we verify a stronger statement for toric Campana orbifolds.A key tool in our study is log geometry and moduli stacks of stable log maps.
Authors
- Qile Chen (ORCID: https://orcid.org/0000-0001-6776-242X)
- Sho Tanimoto (ORCID: https://orcid.org/0000-0002-1884-7934)
- Brian Lehmann (ORCID: https://orcid.org/0000-0002-7837-8797)
Publication Details
- Journal
- Algebraic geometry
- Published
- 2026-08-21
- DOI
- https://doi.org/10.14231/ag-2026-021
- Primary Topic
- Advanced Topology and Set Theory
- Type
- article
- Field-Weighted Citation Impact
- 0.00