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Related papers: Kahler metrics on toric orbifolds

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We complete the classification of all smooth 4-dimensional Kahler geometries admitting a twistor (conformal Killing-Yano) 2-form invariant under a 2-torus action. We establish that there are six geometrically distinct families, and we…

High Energy Physics - Theory · Physics 2025-09-01 Sergei G. Ovchinnikov

We study the interplay between the following types of special non-K\"ahler Hermitian metrics on compact complex manifolds: it locally conformally K\"ahler, $k$-Gauduchon, balanced and locally conformally balanced and prove that a locally…

Differential Geometry · Mathematics 2021-11-29 Liviu Ornea , Alexandra Otiman , Miron Stanciu

In this note we show that on any compact subdomain of a K\"ahler manifold that admits sufficiently many global holomorphic functions, the products of harmonic functions form a complete set. This gives a positive answer to the linearized…

Analysis of PDEs · Mathematics 2018-05-03 Colin Guillarmou , Mikko Salo , Leo Tzou

We give an overview of some recent results in hypersymplectic and para-quaternionic Kahler geometry, and introduce the notion of split three-Sasakian manifold. In particular, we discuss the twistor spaces and Swann bundles of…

Differential Geometry · Mathematics 2007-05-23 A. S. Dancer , H. R. Jorgensen , A. F. Swann

The classification of homogeneous quaternionic manifolds has been done by Alekseevskii, Wolf et al using transitive solvable group of isometries. These manifolds are not generically symmetric, but there is a subset of quaternionic manifolds…

High Energy Physics - Theory · Physics 2008-11-26 Keshav Dasgupta , Veronique Hussin , Alisha Wissanji

We consider equivariant versions of the motivic Chern and Hirzebruch characteristic classes of a quasi-projective toric variety, and extend many known results from non-equivariant to the equivariant setting. The corresponding generalized…

Algebraic Geometry · Mathematics 2025-09-16 Sylvain E. Cappell , Laurenţiu Maxim , Jörg Schürmann , Julius L. Shaneson

Let $G$ denote an infinite-dimensional Heisenberg-like group, which is a class of infinite-dimensional step 2 stratified Lie groups. We consider holomorphic functions on $G$ that are square integrable with respect to a heat kernel measure…

Probability · Mathematics 2011-11-16 Maria Gordina , Tai Melcher

We obtain an example of a compact locally conformal symplectic nilmanifold which admits no locally conformal K\"ahler metrics. This gives a new positive answer to a question raised by L. Ornea and M. Verbitsky.

Differential Geometry · Mathematics 2019-02-25 Giovanni Bazzoni , Juan Carlos Marrero

Let M be a closed symplectic manifold of volume V. We say that the symplectic packings of M by ellipsoids are unobstructed if any collection of disjoint symplectic ellipsoids (possibly of different sizes) of total volume less than V admits…

Symplectic Geometry · Mathematics 2017-08-22 Michael Entov , Misha Verbitsky

We show that a compact Kaehler manifold X is a complex torus if both the continuous part and discrete part of some automorphism group G of X are infinite groups, unless X is bimeromorphic to a non-trivial G-equivariant fibration. Some…

Algebraic Geometry · Mathematics 2018-09-24 Baohua Fu , De-Qi Zhang

Anti-diagonal toric generalized K$\ddot{a}$hler structures of symplectic type on a compact toric symplectic manifold were investigated in \cite{Wang2} . In this article, we consider \emph{general} toric generalized K$\ddot{a}$hler…

Differential Geometry · Mathematics 2018-11-19 Yicao Wang

We show that on a Kahler manifold whether the J-flow converges or not is independent of the chosen background metric in its Kahler class. On toric manifolds we give a numerical characterization of when the J-flow converges, verifying a…

Differential Geometry · Mathematics 2014-12-17 Tristan C. Collins , Gábor Székelyhidi

Let $G$ be a simple compact connected Lie group. We study homogeneous Einstein metrics for a class of compact homogeneous spaces, namely generalized flag manifolds $G/H$ with second Betti number $b_{2}(G/H)=1$. There are 8 infinite families…

Differential Geometry · Mathematics 2019-11-25 Ioannis Chrysikos , Yusuke Sakane

In this note, we propose an approach to the study of the analogue for unipotent harmonic bundles of Schmid's Nilpotent Orbit Theorem. Using this approach, we construct harmonic metrics on unipotent bundles over quasi-compact K\"ahler…

Differential Geometry · Mathematics 2010-01-17 Juergen Jost , Yi-Hu Yang , Kang Zuo

This is the first part of a series of papers where we compute Euler characteristics, signatures, elliptic genera, and a number of other invariants of smooth manifolds that admit Riemannian metrics with positive sectional curvature and large…

Differential Geometry · Mathematics 2016-08-09 Manuel Amann , Lee Kennard

We investigate compact Kahler manifolds, which are acted on by a semisimple compact Lie group G of isometries with one hypersurface orbit. In case of ordinary action and projectable complex structure, we set up a one to one correspondence…

dg-ga · Mathematics 2008-02-03 F. Podesta' , A. Spiro

We give a description of all $G$-invariant Ricci-flat K\"ahler metrics on the canonical complexification of any compact Riemannian symmetric space $G/K$ of arbitrary rank, by using some special local $(1,0)$ vector fields on $T(G/K)$. As…

Differential Geometry · Mathematics 2019-03-04 P. M. Gadea , J. C. González-Dávila , I. V. Mykytyuk

In this paper we introduce the "interpolation-degneration" strategy to study Kahler-Einstein metrics on a smooth Fano manifold with cone singularities along a smooth divisor that is proportional to the anti-canonical divisor. By…

Differential Geometry · Mathematics 2012-10-09 Chi Li , Song Sun

In this paper, improving a preceding work, we obtain asymptotic polybalanced kernels associated to extremal Kaehler metrics on polarized algebraic manifolds. As a corollary, we have a stronger asymptotic relative Chow-polystability for…

Differential Geometry · Mathematics 2016-11-01 Toshiki Mabuchi

A generalized moment map is proposed for arbitrary symplectic actions of compact connected Lie groups on closed symplectic manifolds, in the spirit of the circle -valued maps introduced by D. McDuff in the case of non-Hamiltonian circle…

Symplectic Geometry · Mathematics 2016-09-07 Pierre Sleewaegen