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We investigate the variation of log canonical thresholds in (graded) linear systems. For toric log Fano varieties, we give a sharp lower bound for log canonical thresholds of the anticanonical members in terms of the global minimal log…

代数几何 · 数学 2014-11-12 Florin Ambro

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…

代数几何 · 数学 2024-06-07 Jihao Liu , Fanjun Meng , Lingyao Xie

We show that log canonical thresholds satisfy the ACC

代数几何 · 数学 2012-08-22 Christopher Hacon , James McKernan , Chenyang Xu

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…

代数几何 · 数学 2019-12-19 Tommaso de Fernex , Lawrence Ein , Mircea Mustata

We prove the ascending chain condition for log canonical thresholds of bounded coregularity.

代数几何 · 数学 2022-11-18 Fernando Figueroa , Joaquín Moraga , Junyao Peng

We consider pairs (X,A), where X is a variety with klt singularities and A is a formal product of ideals on X with exponents in a fixed set that satisfies the Descending Chain Condition. We also assume that X has (formally) bounded…

代数几何 · 数学 2010-06-25 Tommaso de Fernex , Lawrence Ein , Mircea Mustata

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

代数几何 · 数学 2020-11-05 Jingjun Han , Zhan Li , Lu Qi

Building on results of Koll\'ar, we prove Shokurov's ACC Conjecture for log canonical thresholds on smooth varieties, and more generally, on varieties with quotient singularities.

代数几何 · 数学 2009-01-09 Lawrence Ein , Mircea Mustata

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.

代数几何 · 数学 2026-02-03 Chih-Kuang Lee

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

代数几何 · 数学 2022-08-26 Osamu Fujino

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

代数几何 · 数学 2023-03-03 Christopher Hacon , Lingyao Xie

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].…

代数几何 · 数学 2009-01-09 Tommaso de Fernex , Mircea Mustata

In this paper we show that the global (log) canonical threshold of $d$-sheeted covers of the $M$-dimensional projective space of index 1, where $d\geqslant 4$, is equal to one for almost all families (except for a finite set). The varieties…

代数几何 · 数学 2019-06-28 Aleksandr V. Pukhlikov

We prove that the log canonical threshold of the base ideal of a complete linear system on a complex abelian variety is $\ge 1$, and equality holds if and only if the base locus has divisorial components. Consequently the same assertions…

代数几何 · 数学 2025-12-29 Giuseppe Pareschi

In terms of log canonical threshold, we characterize plurisubharmonic functions with logarithmic asymptotical behaviour.

复变函数 · 数学 2015-01-21 Alexander Rashkovskii

It was conjectured by Tian that the global log canonical threshold (known as the $\alpha$-invariant) is equal to the level $k$ log canonical threshold (known as the $\alpha_k$-invariant) for all sufficiently large $k$. A weaker folklore…

代数几何 · 数学 2024-12-04 Chenzi Jin

In this paper we show that the set of accumulation points of generalized log canonical thresholds for certain DCC sets comes from the set of generalized log canonical thresholds of dimension $1$ less of the same DCC sets.

代数几何 · 数学 2018-10-31 Jihao Liu

In this paper, we show the log canonical threshold values of the surfaces which has du Val type singularities.These surfaces can be interpreted as statistical or machine learning models. The results of $A_n, D_n, E_6, E_7$ and $E_8$ are…

代数几何 · 数学 2023-12-29 Yoshinori Watanabe

We present the elementary properties of log canonical centers of log varieties.

代数几何 · 数学 2007-05-23 Florin Ambro

We establish a relative spannedness for log canonical pairs, which is a generalization of the basepoint-freeness for varieties with log-terminal singularities by Andreatta--Wi\'sniewski. Moreover, we establish a generalization for quasi-log…

代数几何 · 数学 2020-12-01 Osamu Fujino
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