Finite generation for valuations computing stability thresholds and applications to K-stability

Y Liu, C Xu, Z Zhuang - Annals of Mathematics, 2022 - projecteuclid.org
We prove that on any log Fano pair of dimension n whose stability threshold is less than
n+1n, any valuation computing the stability threshold has a finitely generated associated …

[图书][B] Singularities of the minimal model program

J Kollár - 2013 - books.google.com
This book gives a comprehensive treatment of the singularities that appear in the minimal
model program and in the moduli problem for varieties. The study of these singularities and …

A minimizing valuation is quasi-monomial

C Xu - Annals of Mathematics, 2020 - projecteuclid.org
We prove a version of Jonsson-Mustaţǎ's Conjecture, which says for any graded sequence
of ideals, there exists a quasi-monomial valuation computing its log canonical threshold. As …

Tropical curves, graph complexes, and top weight cohomology of ℳ_ {ℊ}

M Chan, S Galatius, S Payne - Journal of the American Mathematical …, 2021 - ams.org
We study the topology of a space $\Delta _ {g} $ parametrizing stable tropical curves of
genus $ g $ with volume $1 $, showing that its reduced rational homology is canonically …

Algebraicity of the metric tangent cones and equivariant K-stability

C Li, X Wang, C Xu - Journal of the American Mathematical Society, 2021 - ams.org
We prove two new results on the $ K $-polystability of $\mathbb {Q} $-Fano varieties based
on purely algebro-geometric arguments. The first one says that any $ K $-semistable log …

ACC for minimal log discrepancies of exceptional singularities

J Han, J Liu, VV Shokurov - Peking Mathematical Journal, 2024 - Springer
In this paper, we study the ascending chain condition (ACC) conjecture for minimal log
discrepancies (mlds), proposed by the third author. We show the ACC conjecture holds for …

Moduli of boundary polarized Calabi-Yau pairs

K Ascher, D Bejleri, H Blum, K DeVleming… - arXiv preprint arXiv …, 2023 - arxiv.org
We develop the moduli theory of boundary polarized CY pairs, which are slc Calabi-Yau
pairs $(X, D) $ such that $ D $ is ample. The motivation for studying this moduli problem is to …

Tropical and non-Archimedean limits of degenerating families of volume forms

S Boucksom, M Jonsson - Journal de l'École polytechnique …, 2017 - numdam.org
We study the asymptotic behavior of volume forms on a degenerating family of compact
complex manifolds. Under rather general conditions, we prove that the volume forms …

On the connectedness principle and dual complexes for generalized pairs

S Filipazzi, R Svaldi - Forum of Mathematics, Sigma, 2023 - cambridge.org
Let be a pair, and let be a contraction with nef over S. A conjecture, known as the Shokurov–
Kollár connectedness principle, predicts that has at most two connected components, where …

Positivity of the CM line bundle for families of K-stable klt Fano varieties

G Codogni, Z Patakfalvi - Inventiones mathematicae, 2021 - Springer
Abstract The Chow–Mumford (CM) line bundle is a functorial line bundle on the base of any
family of klt Fano varieties. It is conjectured that it yields a polarization on the moduli space …