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We show that generalized log canonical thresholds for complex analytic spaces satisfy the ACC and we characterize the accumulation points.

Algebraic Geometry · Mathematics 2023-03-03 Christopher Hacon , Lingyao Xie

We prove that the only accumulation points of the set $T_3$ of all three-dimensional log canonical thresholds in the interval $[1/2,1]$ are $1/2+1/n$, where $n\in\ZZ$, $n\ge 3$.

Algebraic Geometry · Mathematics 2010-05-04 Yuri G. Prokhorov

We obtain that the nonzero accumulation points of the set of 3-fold canonical thresholds $\ct(X,S)$ are precisely $1/k$ where $k\ge 2$ is an integer and $S$ is an effective integral divisor of a projective 3-fold $X$ with only terminal…

Algebraic Geometry · Mathematics 2022-02-15 Jheng-Jie Chen

We show that log canonical thresholds of fixed dimension are standardized. More precisely, we show that any sequence of log canonical thresholds in fixed dimension $d$ accumulates in a way which is i) either similar to how standard and…

Algebraic Geometry · Mathematics 2024-06-07 Jihao Liu , Fanjun Meng , Lingyao Xie

We generalize the formula for the log canonical threshold(LCT) of plane curves over the complex numbers to arbitrary characteristics. Our proof relies purely on valuation theory, instead of on the theory of $D$-modules.

Algebraic Geometry · Mathematics 2026-02-03 Chih-Kuang Lee

We compute log canonical thresholds of reduced plane curves of degree $d$ at points of multiplicity $d-1$. As a consequence, we describe all possible values of log canonical threshold that are less than $2/(d-1)$ for reduced plane curves of…

Algebraic Geometry · Mathematics 2026-04-22 Erik Paemurru , Nivedita Viswanathan

We show that log canonical thresholds satisfy the ACC

Algebraic Geometry · Mathematics 2012-08-22 Christopher Hacon , James McKernan , Chenyang Xu

In this paper, we show that Shokurov's conjectures on the ACC for $a$-lc thresholds and the ACC for minimal log discrepancies are equivalent in the interval $[0,1)$. That is, the conjecture on ACC for $a$-lc thresholds holds for every…

Algebraic Geometry · Mathematics 2019-09-20 Jihao Liu

We generalize the rationality theorem of the accumulation points of log canonical thresholds which was proved by Hacon, M\textsuperscript{c}Kernan, and Xu. Further, we apply the rationality to the ACC problem on the minimal log…

Algebraic Geometry · Mathematics 2024-04-30 Yusuke Nakamura

Let $\mathcal C\subset(0,1]$ be a set satisfying the descending chain condition. We show that any accumulation point of volumes of log canonical surfaces $(X, B)$ with coefficients in $\mathcal C$ can be realized as the volume of a log…

Algebraic Geometry · Mathematics 2020-01-08 Valery Alexeev , Wenfei Liu

In this note, using methods introduced by Hacon, McKernan and Xu, we study the accumulation points of volumes of varieties of log general type. First, we show that, if the set of boundary coefficients $\Lambda$ is DCC, closed under limits…

Algebraic Geometry · Mathematics 2020-04-22 Stefano Filipazzi

We show that the log canonical threshold of a generic determinantal variety and its generic link are the same.

Algebraic Geometry · Mathematics 2020-11-10 Youngsu Kim , Lance Edward Miller , Wenbo Niu

We show that log canonical thresholds for complex analytic spaces satisfy the ACC.

Algebraic Geometry · Mathematics 2022-08-26 Osamu Fujino

Building on classical aspects of the theory of Diophantine approximation, we consider the collection of all accumulation points of normalized integer vector translates of points $q\alpha$ with $\alpha\in\mathbb{R}^d$ and $q\in\mathbb{Z}$.…

Number Theory · Mathematics 2024-03-14 Kavita Dhanda , Alan Haynes

We describe the set of minimal log discrepancies of toric log varities, and study its accumulation points.

Algebraic Geometry · Mathematics 2007-05-23 Florin Ambro

Shokurov's ACC Conjecture says that the set of all log canonical thresholds on varieties of bounded dimension satisfies the Ascending Chain Condition. This conjecture was proved for log canonical thresholds on smooth varieties in [EM1].…

Algebraic Geometry · Mathematics 2009-01-09 Tommaso de Fernex , Mircea Mustata

We show that the log canonical threshold polytopes of varieties with log canonical singularities satisfy the ascending chain condition.

Algebraic Geometry · Mathematics 2020-11-05 Jingjun Han , Zhan Li , Lu Qi

Let T_n denote the set of log canonical thresholds of pairs (X,Y), with X a nonsingular variety of dimension n, and Y a nonempty closed subscheme of X. Using non-standard methods, we show that every limit of a decreasing sequence in T_n…

Algebraic Geometry · Mathematics 2009-02-02 Tommaso de Fernex , Mircea Mustata

Shokurov conjectured that the set of all log canonical thresholds on varieties of bounded dimension satisfies the ascending chain condition. In this paper we prove that the conjecture holds for log canonical thresholds on smooth varieties…

Algebraic Geometry · Mathematics 2019-12-19 Tommaso de Fernex , Lawrence Ein , Mircea Mustata

We prove that the ascending chain condition (ACC) for log canonical (lc) thresholds in dimension $d$ and Special Termination in dimension $d$ imply the termination of any sequence of log flips starting with a $d$-dimensional lc pair of…

Algebraic Geometry · Mathematics 2007-05-23 Caucher Birkar
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