English

Minimal model program for normal pairs along log canonical locus

Algebraic Geometry 2025-10-21 v3

Abstract

Let (X,Δ)(X,\Delta) be a normal pair with a projective morphism XZX \to Z and let AA be a relatively ample R\mathbb{R}-divisor on XX. We prove the termination of some minimal model program on (X,Δ+A)/Z(X,\Delta+A)/Z and the abundance conjecture for its minimal model under assumptions that the non-nef locus of KX+Δ+AK_{X}+\Delta+A over ZZ does not intersect the non-lc locus of (X,Δ)(X,\Delta) and that the restriction of KX+Δ+AK_{X}+\Delta+A to the non-lc locus of (X,Δ)(X,\Delta) is semi-ample over ZZ.

Keywords

Cite

@article{arxiv.2310.13904,
  title  = {Minimal model program for normal pairs along log canonical locus},
  author = {Kenta Hashizume},
  journal= {arXiv preprint arXiv:2310.13904},
  year   = {2025}
}

Comments

Final version, 79 pages. Expositions in the introduction were improved. Some properties on relative Nakayama--Zariski decomposition were added. Other minor changes were done. To appear in Forum Math. Sigma

R2 v1 2026-06-28T12:57:28.054Z