English

Stein degree on non-Fano type fibrations

Algebraic Geometry 2026-02-09 v2

Abstract

We construct examples showing that Stein degree of vertical divisors on non-Fano type log Calabi-Yau fibrations is unbounded.

Keywords

Cite

@article{arxiv.2509.21824,
  title  = {Stein degree on non-Fano type fibrations},
  author = {Caucher Birkar and Santai Qu},
  journal= {arXiv preprint arXiv:2509.21824},
  year   = {2026}
}

Comments

final version, revised according to suggestions from reviewers, published in Surveys in Differential Geometry