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We consider higher dimensional generalisations of normal almost contact structures, the so called f.pk-structures where parallelism spans a Lie algebra g (f.pk-g-structures). Two types of these structures are discussed. In the first case,…

Differential Geometry · Mathematics 2016-11-15 Andrzej Czarnecki , Marcin Sroka , Robert Wolak

We abstract Morimoto's construction of complex structures on product manifolds to pairs of certain generalized $F$-structures on manifolds that are not necessarily global products. As applications we characterize invariant generalized…

Differential Geometry · Mathematics 2024-02-23 Marco Aldi , Daniele Grandini

Strong K\"ahler with Torsion is the target space geometry of $(2,1)$ and $(2,0)$ supersymmetric nonlinear sigma models. We discuss how it can be represented in terms of Generalised Complex Geometry in analogy to the Gualtieri map from the…

High Energy Physics - Theory · Physics 2019-04-09 Chris Hull , Ulf Lindström

We study generalized Kaehler manifolds for which the corresponding complex structures commute and classify completely the compact generalized Kaehler four-manifolds for which the induced complex structures yield opposite orientations.

Differential Geometry · Mathematics 2007-05-23 Vestislav Apostolov , Marco Gualtieri

Generalized Calabi-Gray manifolds are non-K\"ahler complex manifolds with very explicit geometry yet not being homogeneous. In this note, we demonstrate that how generalized Calabi-Gray manifolds can be used to answer some questions in…

Differential Geometry · Mathematics 2023-07-26 Teng Fei

In this paper we define a canonical Poisson structure on a normal generalized contact metric space and use this structure to define a generalized Sasakian structure. We show also that this canonical Poisson structure enables us to…

Differential Geometry · Mathematics 2023-06-12 Janet Talvacchia

We define a generalized almost para-Hermitian structure to be a commuting pair $(\mathcal{F},\mathcal{J})$ of a generalized almost para-complex structure and a generalized almost complex structure with an adequate non-degeneracy condition.…

Differential Geometry · Mathematics 2015-04-21 Izu Vaisman

We study integrability of generalized almost contact structures, and find conditions under which the main associated maximal isotropic vector bundles form Lie bialgebroids. These conditions differentiate the concept of generalized contact…

Differential Geometry · Mathematics 2014-02-26 Yat Sun Poon , Aissa Wade

We establish a generalized analogue of the Boothby-Wang theorem in generalized contact geometry, along with related results. We present a general method for constructing examples of generalized contact structures that are not of Poon-Wade…

Differential Geometry · Mathematics 2026-02-27 Debjit Pal

In this study, we investigate generalized quasi-Einstein structure for normal metric contact pair manifolds. Firstly, we deal with elementary properties and examine, existence, and characterizations of generalized quasi-Einstein normal…

Differential Geometry · Mathematics 2021-02-23 İnan Ünal

The present paper deals with the study of generalized $\phi$-recurrent generalized $(k,\mu)$-contact metric manifolds with the existence of such notion by a proper example.

Differential Geometry · Mathematics 2017-07-05 Shyamal Kumar Hui

We study the K\"ahler geometry of stage n Bott manifolds, which can be viewed as $n$-dimensional generalizations of Hirzebruch surfaces. We show, using a simple induction argument and the generalized Calabi construction from…

Differential Geometry · Mathematics 2020-12-17 Charles P. Boyer , David M. J. Calderbank , Christina W. Tønnesen-Friedman

Let $M_i$, for $i=1,2$, be a K\"ahler manifold, and let $G$ be a Lie group acting on $M_i$ by K\"ahler isometries. Suppose that the action admits a momentum map $\mu_i$ and let $N_i:=\mu_i^{-1}(0)$ be a regular level set. When the action of…

Differential Geometry · Mathematics 2024-12-23 Leonardo Biliotti , Alessandro Minuzzo

This is an expository paper, which provides a first introduction to geometric structures on $TM\oplus T^*M$. The paper contains definitions and characteristic properties of generalized complex, generalized Kaehler, generalized (normal,…

Differential Geometry · Mathematics 2010-05-27 Izu Vaisman

This is a sequel of \cite{Wang}, which provides a general formalism for this paper. We mainly investigate thoroughly a subclass of toric generalized K$\ddot{a}$hler manifolds of symplectic type introduced by Boulanger in \cite{Bou}. We find…

Differential Geometry · Mathematics 2018-10-22 Yicao Wang

Given a quaternionic manifold $M$ with a certain $\mathrm{U}(1)$-symmetry, we construct a hypercomplex manifold $M'$ of the same dimension. This construction generalizes the quaternionic K\"ahler/hyper-K\"ahler-correspondence. As an example…

Differential Geometry · Mathematics 2019-04-15 Vicente Cortés , Kazuyuki Hasegawa

We construct a Kahler structure (which we call a generalised Kahler cone) on an open subset of the cone of a strongly pseudo-convex CR manifold endowed with a 1-parameter family of compatible Sasaki structures. We determine those…

Differential Geometry · Mathematics 2014-01-14 Liana David

We define the operations of conformal change and elementary deformation in the setting of generalized complex geometry. Then we apply Swann's twist construction to generalized (almost) complex and Hermitian structures obtained by these…

Differential Geometry · Mathematics 2017-12-07 Vicente Cortés , Liana David

k-Contact geometry is a generalisation of contact geometry to analyse field theories. We develop an approach to k-contact geometry based on distributions that are distributionally maximally non-integrable and admit, locally, k commuting…

Differential Geometry · Mathematics 2025-02-06 Javier de Lucas , Xavier Rivas , Tomasz Sobczak

In this paper we obtain a stability theorem of generalized Kahler structures with one pure spinor under small deformations of generalized complex structures. (This is analogous to the stability theorem of Kahler manifolds by…

Differential Geometry · Mathematics 2010-09-21 Ryushi Goto