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Using toric geometry we give an explicit construction of the compact steady solitons for pluriclosed flow first constructed in arXiv:1802.00170. This construction also reveals that these solitons are generalized K\"ahler in two distinct…

Differential Geometry · Mathematics 2019-07-10 Jeffrey Streets , Yury Ustinovskiy

In this paper, we generalize Chen-Tian energy functionals to K\"ahler-Ricci solitons and prove that the properness of these functionals is equivalent to the existence of K\"ahler-Ricci solitons. We also discuss the equivalence of the lower…

Differential Geometry · Mathematics 2009-07-01 Haozhao Li

Building on works of Boulanger and Goto, we show that Goto's scalar curvature is the moment map for an action of generalized Hamiltonian automorphisms of the associated Courant algebroid, constrained by the choice of an adapted volume form.…

Differential Geometry · Mathematics 2026-02-03 Vestislav Apostolov , Jeffrey Streets , Yury Ustinovskiy

We derive a local ansatz for generalized K\"ahler surfaces with nondegenerate Poisson structure and a biholomorphic $S^1$ action which generalizes the classic Gibbons-Hawking ansatz for invariant hyperK\"ahler manifolds, and allows for the…

Differential Geometry · Mathematics 2022-02-09 Jeffrey Streets , Yury Ustinovskiy

We investigate the linear stability of K\"ahler-Ricci solitons for perturbations induced by varying the complex structure within a fixed K\"ahler class. We calculate stability for the known examples of K\"ahler-Ricci solitons.

Differential Geometry · Mathematics 2016-01-20 Stuart James Hall , Thomas Murphy

We show that the generalized K\"ahler-Ricci soliton equation on 4-dimensional toric K\"ahler orbifolds reduces to ODEs assuming there is a Hamiltonian 2-form. This leads to an explicit resolution of this equation on labeled triangles and…

Differential Geometry · Mathematics 2012-09-05 Eveline Legendre , Christina W. Tønnesen-Friedman

We study Hamiltonian dynamics of gradient Kaehler-Ricci solitons that arise as limits of dilations of singularities of the Ricci flow on compact Kaehler manifolds. Our main result is that the underlying spaces of such gradient solitons must…

Differential Geometry · Mathematics 2007-05-23 Huai-Dong Cao , Richard S. Hamilton

Let $(M, g, \omega, f, \lambda)$ be a K\"{a}hler gradient Ricci soliton in real dimension four. One first observes that it is an integrable Hamiltonian system in a classical sense. Indeed, all known complete examples are toric and the…

Differential Geometry · Mathematics 2026-01-23 Hung Tran

We study a Boltzmann's type entropy functional (which appeared in existing literature) defined on K\"ahler metrics of a fixed K\"ahler class. The critical points of this functional are gradient K\"ahler-Ricci solitons, and the functional…

Differential Geometry · Mathematics 2016-05-26 Frederick Tsz-Ho Fong

In this paper, we study the uniformly strong convergence of K\"ahler-Ricci flow on a Fano manifold with varied initial metrics and smooth deformation complex structures. As an application, we prove the uniqueness of K\"ahler-Ricci solitons…

Differential Geometry · Mathematics 2020-09-23 Feng Wang , Xiaohua Zhu

We establish a local equivalence between toric steady K\"ahler-Ricci solitons and $A$-type toric generalized K\"ahler-Ricci solitons (GKRS). Under natural global conditions we show this equivalence extends to complete GKRS, yielding a…

Differential Geometry · Mathematics 2025-09-04 Vestislav Apostolov , Giuseppe Barbaro , Jeffrey Streets , Yury Ustinovskiy

On a compact complex manifold $(M, J)$ endowed with a holomorphic Poisson tensor $\pi_J$ and a deRham class $\alpha\in H^2(M, \mathbb R)$, we study the space of generalized K\"ahler (GK) structures defined by a symplectic form $F\in \alpha$…

Differential Geometry · Mathematics 2023-02-24 Vestislav Apostolov , Jeffrey Streets , Yury Ustinovskiy

We show that the underlying complex manifold of a complete non-compact two-\linebreak dimensional shrinking gradient K\"ahler-Ricci soliton $(M,\,g,\,X)$ with soliton metric $g$ with bounded scalar curvature $\operatorname{R}_{g}$ whose…

Differential Geometry · Mathematics 2022-12-15 Charles Cifarelli , Ronan J. Conlon , Alix Deruelle

The generalized Einstein Hilbert action is an extension of the classic scalar curvature energy and Perelman F functional which incorporates a closed three-form. The critical points are known as generalized Ricci solitons, which arise…

Differential Geometry · Mathematics 2026-01-13 Kuan-Hui Lee

We show that integrability of an almost complex structure in complex dimension $m$ is equivalent, in the presence of an almost hermitian metric, to $m(m-1)$ equations involving what we call shear operators. Inspired by this, we give an…

Differential Geometry · Mathematics 2021-01-07 Gideon Maschler , Robert Ream

We give a classification of compact solitons for the pluriclosed flow on complex surfaces. First, by exploiting results from the Kodaira classification of surfaces, we show that the complex surface underlying a soliton must be K\"ahler…

Differential Geometry · Mathematics 2018-02-02 Jeffrey Streets

We give a new characterization of generalized K\"ahler structures in terms of their corresponding complex Dirac structures. We then give an alternative proof of Hitchin's partial unobstructedness for holomorphic Poisson structures. Our main…

Differential Geometry · Mathematics 2018-07-26 Marco Gualtieri

We prove the existence of a unique complete shrinking gradient K\"ahler-Ricci soliton with bounded scalar curvature on the blowup of $\mathbb{C}\times\mathbb{P}^{1}$ at one point. This completes the classification of such solitons in two…

Differential Geometry · Mathematics 2022-06-23 Richard H. Bamler , Charles Cifarelli , Ronan J. Conlon , Alix Deruelle

On a manifold of dimension at least six, let $(g,\tau)$ be a pair consisting of a K\"ahler metric g which is locally K\"ahler irreducible, and a nonconstant smooth function $\tau$. Off the zero set of $\tau$, if the metric…

Differential Geometry · Mathematics 2007-08-09 Gideon Maschler

In this article, we investigate four-dimensional gradient shrinking Ricci solitons close to a K\"ahler model. The first theorem could be considered as a rigidity result for the K\"ahler-Ricci soliton structure on $\mathbb{S}^2\times…

Differential Geometry · Mathematics 2022-12-13 Xiaodong Cao , Ernani Ribeiro , Hung Tran
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