English

Finitistic test ideals on numerically $\mathbb{Q}$-Gorenstein varieties

Commutative Algebra 2018-08-08 v3 Algebraic Geometry

Abstract

We prove that the finitistic test ideal τfg(R,Δ,at)\tau_{\rm fg}(R, \Delta, \mathfrak{a}^t) coincides with the big test ideal τb(R,Δ,at)\tau_{\rm b}(R, \Delta, \mathfrak{a}^t) if the pair (R,Δ)(R,\Delta) is numerically log Q\mathbb{Q}-Gorenstein.

Cite

@article{arxiv.1709.09383,
  title  = {Finitistic test ideals on numerically $\mathbb{Q}$-Gorenstein varieties},
  author = {Shunsuke Takagi},
  journal= {arXiv preprint arXiv:1709.09383},
  year   = {2018}
}

Comments

12 pages, v2: errors in Lemma 3.1 and Remark 3.3 corrected, v3: a minor revision, to appear in J. Algebra

R2 v1 2026-06-22T21:56:19.875Z