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We develop a framework to study the K-stability of weighted Fano hypersurfaces based on a combination of birational and convex-geometric techniques. As an application, we prove that all quasi-smooth weighted Fano hypersurfaces of index 1…

Algebraic Geometry · Mathematics 2026-01-07 Livia Campo , Kento Fujita , Taro Sano , Luca Tasin

Church-Ellenberg-Farb used the language of FI-modules to prove that the cohomology of certain sequences of hyperplane arrangements with S_n-actions satisfies representation stability. Here we lift their results to the level of the…

Geometric Topology · Mathematics 2016-06-13 Nir Gadish

We introduce birational strong complete regularity and strong complete regularity, two numerical invariants for pairs of (relative) Fano type. They are defined using variants of qdlt Fano type models and the dimension of the dual complex of…

Algebraic Geometry · Mathematics 2026-03-05 Jihao Liu , Konstantin Loginov

We construct a projective K-moduli space of quasimaps with a certain log Fano condition, which is regarded as a rational map from $\mathbb{P}^1$ to a projective space. Moreover, we investigate relationships between the K-moduli of quasimaps…

Algebraic Geometry · Mathematics 2026-01-09 Kenta Hashizume , Masafumi Hattori

This paper is largely concerned with constructing coarse moduli spaces for Artin stacks. The main purpose of this paper is to introduce the notion of stability on an arbitrary Artin stack and construct a coarse moduli space for the open…

Algebraic Geometry · Mathematics 2010-07-05 Isamu Iwanari

Given a moduli problem posed using Geometric Invariant Theory, one can use Non-Reductive Geometric Invariant Theory to quotient unstable HKKN strata and construct 'moduli spaces of unstable objects', extending the usual moduli…

Algebraic Geometry · Mathematics 2021-11-16 Joshua Jackson

We formulate a stable reduction conjecture that extends Deligne-Mumford's stable reduction to higher dimensions and provide a simple proof that it holds in large characteristic, assuming two standard conjectures of the Minimal Model…

Algebraic Geometry · Mathematics 2024-11-28 Tai-Hsuan Chung

We prove two general results concerning spectral sequences of $\mathbf{FI}$-modules. These results can be used to significantly improve stable ranges in a large portion of the stability theorems for $\mathbf{FI}$-modules currently in the…

Representation Theory · Mathematics 2018-05-09 Thomas Church , Jeremy Miller , Rohit Nagpal , Jens Reinhold

In this note, we use recent advances concerning the K-stability of $\mathbb{Q}$-Fano varieties to provide settings for which Vojta's conjecture holds.

Algebraic Geometry · Mathematics 2024-01-04 Jackson S. Morrow , Yueqiao Wu

We construct proper good moduli spaces parametrizing K-polystable $\mathbb{Q}$-Gorenstein smoothable log Fano pairs $(X, cD)$, where $X$ is a Fano variety and $D$ is a rational multiple of the anti-canonical divisor. We then establish a…

Algebraic Geometry · Mathematics 2024-05-01 Kenneth Ascher , Kristin DeVleming , Yuchen Liu

For an atomic orbital base category in the sense of Barwick-Dotto-Glasman-Nardin-Shah, we introduce the category of parametrised perfect-stable categories and use it to construct the parametrised version of noncommutative motives in which…

K-Theory and Homology · Mathematics 2026-03-18 Kaif Hilman

We identify Le Potier's moduli spaces of limit stable pairs $(F,s)$, where $F$ is a 2-dimensional sheaf on a nonsingular projective 4-fold $X$ and $s \in H^0(F)$, with the moduli spaces of polynomial stable 2-term complexes in derived…

Algebraic Geometry · Mathematics 2021-11-16 Amin Gholampour , Yunfeng Jiang , Jason Lo

While decomposition of one-parameter persistence modules behaves nicely, as demonstrated by the algebraic stability theorem, decomposition of multiparameter modules is known to be unstable in a certain precise sense. Until now, it has not…

Representation Theory · Mathematics 2025-03-12 Håvard Bakke Bjerkevik

We compute global log canonical thresholds, or equivalently alpha invariants, of birationally rigid orbifold Fano threefolds embedded in weighted projective spaces as codimension two or three. As an important application, we prove that most…

Algebraic Geometry · Mathematics 2016-04-04 In-Kyun Kim , Takuzo Okada , Joonyeong Won

For a field K, rational function phi in K(z) of degree at least two, and alpha in P^1(K), we study the polynomials in K[z] whose roots are given by the solutions to phi^n(z) = alpha, where phi^n denotes the nth iterate of phi. When the…

Number Theory · Mathematics 2021-11-24 Rafe Jones , Alon Levy

In this note, we study K-stability of smooth Fano threefolds that can be obtained by blowing up the three-dimensional projective space along a smooth elliptic curve of degree five.

Algebraic Geometry · Mathematics 2024-07-09 Ivan Cheltsov , Piotr Pokora

In this paper, we prove that any polarized K-stable manifold is CM-stable. This extends what I did for Fano manifolds in my 2012 paper.

Differential Geometry · Mathematics 2014-09-30 Gang Tian

We introduce the notion of a logarithmic stable map from a minimal log prestable curve to a log twisted semi-stable variety of form $xy=0$. We study the compactification of the moduli spaces of such maps and provide a perfect obstruction…

Algebraic Geometry · Mathematics 2009-01-20 Bumsig Kim

In this work we use the deformation procedure and explore the route to obtain distinct field theory models that present similar stability potentials. Starting from systems that interact polynomially or hyperbolically, we use a deformation…

High Energy Physics - Theory · Physics 2018-07-04 D. Bazeia , D. A. Ferreira , Elisama E. M. Lima , L. Losano

We make some observation on the logarithmic version of K-stability.

Differential Geometry · Mathematics 2011-04-05 Chi Li