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We find all K-polystable smooth Fano threefolds that can be obtained as blowup of projective space along the disjoint union of a twisted cubic curve and a line.

Algebraic Geometry · Mathematics 2022-03-25 Elena Denisova

We study Fano threefolds that can be obtained by blowing up the three-dimensional projective space along a smooth curve of degree six and genus three. We produce many new K-stable examples of such threefolds, and we describe all finite…

Algebraic Geometry · Mathematics 2024-04-12 Ivan Cheltsov , Oliver Li , Sione Ma'u , Antoine Pinardin

We study K-stability of smooth Fano threefolds of Picard rank $2$ and degree $22$ which can be obtained by blowing up a smooth complete intersection of two quadrics in $\mathbb{P}^5$ along a conic. We also describe the automorphism groups…

We prove that every smooth Fano threefold from the family No 2.8 is K-stable. Such a Fano threefold is a double cover of the blow-up of $\mathbb{P}^3$ at one point branched along an anti-canonical divisor.

Algebraic Geometry · Mathematics 2022-11-16 Yuchen Liu

We give new proofs of the K-polystability of two smooth Fano threefolds. One of them is a~smooth divisor in $\mathbb{P}^1\times\mathbb{P}^1\times\mathbb{P}^2$ of degree $(1,1,1)$, which is unique up to isomorphism. Another one is the~blow…

Algebraic Geometry · Mathematics 2021-07-13 Ivan Cheltsov , Hendrik Süß

We show that a Fano manifold (X,-K_X) is not slope stable with respect to a smooth curve Z if and only if (X,Z) is isomorphic to one of (projective space, line), (product of projective line and projective space, fiber of second projection)…

Algebraic Geometry · Mathematics 2011-07-08 Kento Fujita

In this article, we study the K-moduli space of Fano threefolds obtained by blowing up $\mathbb{P}^3$ along $(2,3)$-complete intersection curves. This K-moduli space is a two-step birational modification of the GIT moduli space of…

Algebraic Geometry · Mathematics 2025-02-14 Yuchen Liu , Junyan Zhao

We prove K-stability for infinitely many smooth members of the family 2.19 of the Mukai-Mori classification.

Algebraic Geometry · Mathematics 2024-12-25 Tiago Duarte Guerreiro , Luca Giovenzana , Nivedita Viswanathan

We prove K-stability of smooth Fano 3-folds of Picard rank 3 and degree 20 that satisfy very explicit generality condition.

Algebraic Geometry · Mathematics 2024-03-15 Elena Denisova

We prove K-stability of smooth Fano 3-folds of Picard rank 3 and degree 22 that satisfy very explicit generality condition.

Algebraic Geometry · Mathematics 2024-01-08 Ivan Cheltsov

We investigate the K-stability of certain blow-ups of $\mathbb{P}^1$-bundles over a Fano variety $V$, where the $\mathbb{P}^1$-bundle is the projective compactification of a line bundle $L$ proportional to $-K_V$ and the center of the…

Algebraic Geometry · Mathematics 2024-12-17 Daniel Mallory

Ross and Thomas introduced the concept of slope stability to study K-stability, which has conjectural relation with the existence of constant scalar curvature K\"ahler metric. This paper presents a study of slope stability of Fano manifolds…

Algebraic Geometry · Mathematics 2014-02-26 Jun-Muk Hwang , Hosung Kim , Yongnam Lee , Jihun Park

We prove that all general smooth Fano threefolds of Picard rank $3$ and degree $14$ are K-stable, where the generality condition is stated explicitly.

Algebraic Geometry · Mathematics 2024-05-22 Grigory Belousov , Konstantin Loginov

We prove that all smooth Fano threefolds with Picard rank 2 and degree 28 are K-polystable, except for some explicit cases which we describe. We also give a classification of the normal bundle of a rational normal quartic curve in a smooth…

Algebraic Geometry · Mathematics 2025-07-17 Joseph Malbon

We show relationships between uniform K-stability and plt blowups of log Fano pairs. We see that it is enough to evaluate certain invariants defined by volume functions for all plt blowups in order to test uniform K-stability of log Fano…

Algebraic Geometry · Mathematics 2019-07-17 Kento Fujita

We study the K-stability of singular Fano 3-folds with canonical Gorenstein singularities whose anticanonical linear system is base-point-free but not very ample.

Algebraic Geometry · Mathematics 2026-02-16 Hamid Abban , Ivan Cheltsov , Adrien Dubouloz , Kento Fujita , Takashi Kishimoto , Jihun Park

We prove that all smooth Fano threefolds of rank 4 and degree 24 are K-stable.

Algebraic Geometry · Mathematics 2022-06-27 Grigory Belousov , Konstantin Loginov

We prove that smooth Fano 3-folds in the families 2.18 and 3.4 are K-stable.

Algebraic Geometry · Mathematics 2023-04-25 Ivan Cheltsov , Kento Fujita , Takashi Kishimoto , Jihun Park

We show that certain Galois covers of K-semistable Fano varieties are K-stable. We use this to give some new examples of Fano manifolds admitting K\"ahler-Einstein metrics, including hypersurfaces, double solids and threefolds.

Algebraic Geometry · Mathematics 2018-05-16 Ruadhaí Dervan

We give a simple criterion for slope stability of Fano manifolds $X$ along divisors or smooth subvarieties. As an application, we show that $X$ is slope stable along an ample effective divisor $D\subset X$ unless $X$ is isomorphic to a…

Algebraic Geometry · Mathematics 2013-01-22 Kento Fujita
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