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We prove that for any smooth polarized complex $n$-dimensional manifold $(X, L_X)$ which admits an extremal K\"ahler metric in $c_1(L_X)$, and for any integer $k$ large enough (in terms of a bound depending on $(X, L_X)$), the…

Differential Geometry · Mathematics 2026-04-01 Vestislav Apostolov , Abdellah Lahdili , Chung-Ming Pan

On a 3-manifold bounding a compact 4-manifold, let a conformal structure be induced from a complete Einstein metric which conformally compactifies to a K\"ahler metric. Formulas are derived for the eta invariant of this conformal structure…

Differential Geometry · Mathematics 2011-05-24 Gideon Maschler

A homogeneous Gibbons-Hawking ansatz is described, leading to 4-dimensional hyperkahler metrics with homotheties. In combination with Blaschke products on the unit disc in the complex plane, this ansatz allows one to construct…

Differential Geometry · Mathematics 2010-08-27 Hansjörg Geiges , Jesús Gonzalo

In this paper, we study an important class of Finsler metrics--square metrics. We give two expressions of such metrics in terms of a Riemannian metric and a 1-form. We show that Einstein square metrics can be classified up to the…

Differential Geometry · Mathematics 2012-09-19 Zhongmin Shen , Changtao Yu

A new solution to the Einstein-Maxwell field equations is presented describing a cylindrically symmetric homogeneous cosmology. The solution is conformally flat, it possesses seven Killing vectors of which the timelike one is rotating and…

General Relativity and Quantum Cosmology · Physics 2007-05-23 Hector Vargas Rodriguez

We study the quantization of coupled K\"ahler-Einstein (CKE) metrics, namely we approximate CKE metrics by means of the canonical Bergman metrics, so called the ``balanced metrics''. We prove the existence and weak convergence of balanced…

Differential Geometry · Mathematics 2021-09-08 Ryosuke Takahashi

Generalizing the scaling limit of Martelli and Sparks [hep-th/0505027] into an arbitrary number of spacetime dimensions we re-obtain the (most general explicitly known) Einstein-Sasaki spaces constructed by Chen, Lu, and Pope…

High Energy Physics - Theory · Physics 2015-05-13 David Kubiznak

We show that a K\"ahler-Ricci soliton on a Fano manifold can always be smoothly approximated by a sequence of relative anticanonically balanced metrics, also called quantized K\"ahler-Ricci solitons. The proof uses a semiclassical estimate…

Differential Geometry · Mathematics 2022-04-27 Louis Ioos

In the compact setting, Aazami and Ream \cite{Aazami:2022th} proved that Riemannian metrics dual to a class of Lorentzian metrics, called (compact) general plane-fronted waves, are almost-K\"ahler. In this note, we explain how to construct…

Differential Geometry · Mathematics 2022-08-02 Mehdi Lejmi , Xi Sisi Shen

After a review of the general properties of holomorphic spheres in complex surfaces we describe the local geometry in the vicinity of a CP^1 embedded with a negative normal bundle. As a by-product, we build (asymptotically locally…

High Energy Physics - Theory · Physics 2013-07-11 Dmitri Bykov

We show that every Kato surface (or surface with a global spherical shell) admits a locally conformally Kaehler metric.

Complex Variables · Mathematics 2010-01-05 Marco Brunella

Within the metric structure endowed with two orthogonal space-like Killing vectors a class of solutions of the Einstein-Maxwell-Dilaton field equations is presented. Two explicitly given sub-classes of solutions bear an interpretation as…

High Energy Physics - Theory · Physics 2009-10-28 Nora Breton , Tonatiuh Matos , Alberto Garcia

Given a weighted line arrangement in the projective plane, with weights satisfying natural constraint conditions, we show the existence of a Ricci-flat K\"ahler metric with cone singularities along the lines asymptotic to a polyhedral…

Differential Geometry · Mathematics 2021-10-26 Martin de Borbon , Cristiano Spotti

We extend Tsuji's iterative construction of complete K\"ahler--Einstein metrics with negative scalar curvature to noncompact K\"ahler manifolds with bounded geometry, using Berndtsson's method from the compact setting. Consequently, given a…

Differential Geometry · Mathematics 2026-01-13 Quang-Tuan Dang , Tat Dat Tô

We prove the existence of non-positively curved K\"ahler-Einstein metrics with cone singularities along a given simple normal crossing divisor on a compact K\"ahler manifold, under a technical condition on the cone angles, and we also…

Complex Variables · Mathematics 2016-05-10 Frédéric Campana , Henri Guenancia , Mihai Păun

Consider a fibred compact K\"ahler manifold X endowed with a relatively ample line bundle, such that each fibre admits a constant scalar curvature K\"ahler metric and has discrete automorphism group. Assuming the base of the fibration…

Differential Geometry · Mathematics 2019-10-02 Ruadhaí Dervan , Lars Martin Sektnan

Using the Yau-Tian-Donaldson type correspondence for $v$-solitons established by Han-Li, we show that a smooth complex $n$-dimensional Fano variety admits a Mabuchi soliton provided it admits an extremal K\"ahler metric whose scalar…

Differential Geometry · Mathematics 2025-01-03 Vestislav Apostolov , Abdellah Lahdili , Yasufumi Nitta

We establish an equivalence between conformally Einstein--Maxwell Kahler 4-manifolds (recently studied in many works) and extremal Kahler 4-manifolds (in the sense of Calabi) with nowhere vanishing scalar curvature. The corresponding pairs…

Differential Geometry · Mathematics 2019-01-07 Vestislav Apostolov , David M. J. Calderbank

We study the existence of extremal K\"ahler metrics on K\"ahler manifolds. After introducing a notion of relative K-stability for K\"ahler manifolds, we prove that K\"ahler manifolds admitting extremal K\"ahler metrics are relatively…

Differential Geometry · Mathematics 2017-09-04 Ruadhaí Dervan

We study the integrability conditions of the conformal Killing equations for the Eisenhart lift of a scalar field in a flat Friedmann-Lema\^\i tre-Robertson-Walker universe. We show that the potential found in our earlier work is already…

General Relativity and Quantum Cosmology · Physics 2026-05-04 Takeshi Chiba , Tsuyoshi Houri