On positivity of the CM line bundle on K-moduli spaces

C Xu, Z Zhuang - Annals of mathematics, 2020 - projecteuclid.org
In this paper, we consider the CM line bundle on the K-moduli space, ie, the moduli space
parametrizing K-polystable Fano varieties. We prove it is ample on any proper subspace …

Reductivity of the automorphism group of K-polystable Fano varieties

J Alper, H Blum, D Halpern-Leistner, C Xu - Inventiones mathematicae, 2020 - Springer
We prove that K-polystable log Fano pairs have reductive automorphism groups. In fact, we
deduce this statement by establishing more general results concerning the S-completeness …

K-stability of Fano varieties: an algebro-geometric approach

C Xu - EMS Surveys in Mathematical Sciences, 2021 - content.ems.press
K-stability of Fano varieties: an algebro-geometric approach Page 1 EMS Surv. Math. Sci. 8 (2021),
265–354 DOI 10.4171/EMSS/51 © 2021 European Mathematical Society Published by EMS …

Uniqueness of the minimizer of the normalized volume function

C Xu, Z Zhuang - arXiv preprint arXiv:2005.08303, 2020 - arxiv.org
We confirm a conjecture of Chi Li which says that the minimizer of the normalized volume
function for a klt singularity is unique up to rescaling. This is achieved by defining stability …

On properness of K-moduli spaces and optimal degenerations of Fano varieties

H Blum, D Halpern-Leistner, Y Liu, C Xu - Selecta Mathematica, 2021 - Springer
We establish an algebraic approach to prove the properness of moduli spaces of K-
polystable Fano varieties and reduce the problem to a conjecture on destabilizations of K …

The existence of the Kähler–Ricci soliton degeneration

H Blum, Y Liu, C Xu, Z Zhuang - Forum of Mathematics, Pi, 2023 - cambridge.org
We prove an algebraic version of the Hamilton–Tian conjecture for all log Fano pairs. More
precisely, we show that any log Fano pair admits a canonical two-step degeneration to a …

[HTML][HTML] K-stability and birational models of moduli of quartic K3 surfaces

K Ascher, K DeVleming, Y Liu - Inventiones mathematicae, 2023 - Springer
We show that the K-moduli spaces of log Fano pairs (P 3, c S) where S is a quartic surface
interpolate between the GIT moduli space of quartic surfaces and the Baily–Borel …

Algebraic uniqueness of K\"{a} hler-Ricci flow limits and optimal degenerations of Fano varieties

J Han, C Li - arXiv preprint arXiv:2009.01010, 2020 - arxiv.org
We prove that for any $\mathbb {Q} $-Fano variety $ X $, the special $\mathbb {R} $-test
configuration that minimizes the $ H $-functional is unique and has a K-semistable $\mathbb …

Optimal destabilization of K–unstable Fano varieties via stability thresholds

H Blum, Y Liu, C Zhou - Geometry & Topology, 2022 - msp.org
We show that for a K–unstable Fano variety, any divisorial valuation computing its stability
threshold induces a nontrivial special test configuration preserving the stability threshold …

Wall crossing for K‐moduli spaces of plane curves

K Ascher, K DeVleming, Y Liu - Proceedings of the London …, 2024 - Wiley Online Library
We construct proper good moduli spaces parametrizing K‐polystable QQ‐Gorenstein
smoothable log Fano pairs (X, c D) (X,cD), where XX is a Fano variety and DD is a rational …