Results 61 to 70 of about 3,068 (120)
A note on para-quaternion manifolds [PDF]
arXiv, 2003 We show that a para-quaternion nearly Kahler manifold is necessarily a para-quaternion Kahler ...
arxiv
Classification of contact structures associated with the CR-structure of the complex indicatrix
Analele Stiintifice ale Universitatii Ovidius Constanta: Seria Matematica, 2017 By regarding the complex indicatrix as an embedded CR-hypersurface of the holomorphic tangent bundle in a fixed point, we analyze some aspects of the relations between its CR structure and the considered contact structure.
Popovici Elena
doaj +1 more source
Pseudoholomorphic discs near an elliptic point [PDF]
arXiv, 2005 We prove the existence and study the geometry of Bishop discs near an elliptic point of a real n-dimensional submanifold of an almost complex n-dimensional manifold.
arxiv
A closed symplectic four-manifold has almost Kaehler metrics of negative scalar curvature [PDF]
arXiv, 2006 We show that every closed symplectic four-dimensional manifold admits compatible almost Kaehler metrics of negative scalar curvature.
arxiv
Formality and the Lefschetz property in symplectic and cosymplectic geometry
Complex Manifolds, 2015 We review topological properties of Kähler and symplectic manifolds, and of their odd-dimensional counterparts, coKähler and cosymplectic manifolds. We focus on formality, Lefschetz property and parity of Betti numbers, also distinguishing the simply ...
Bazzoni Giovanni +2 more
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On three dimensional conformally flat almost cosymplectic manifolds [PDF]
arXiv, 2007 In the paper there are described new examples of conformally flat three dimensional almost cosymplectic manifolds. All these manifolds form a class which was completely characterized.
arxiv
Pseudo-slant submanifolds in cosymplectic space forms
Acta Universitatis Sapientiae: Mathematica, 2016 In this paper, we study the geometry of the pseudo-slant submanifolds of a cosymplectic space form. Necessary and sufficient conditions are given for a submanifold to be a pseudo-slant submanifold, pseudo-slant product, mixed geodesic and totally ...
Dirik Süleyman, Atçeken Mehmet
doaj +1 more source
On Kähler-like and G-Kähler-like almost Hermitian manifolds
Complex Manifolds, 2020 We introduce Kähler-like, G-Kähler-like metrics on almost Hermitian manifolds. We prove that a compact Kähler-like and G-Kähler-like almost Hermitian manifold equipped with an almost balanced metric is Kähler.
Kawamura Masaya
doaj +1 more source
Almost Paracontact Manifolds [PDF]
arXiv, 2008 In this paper eleven basic classes of almost paracontact manifolds are introduced and some examples are constructed.
arxiv
Formality of cyclic cochains [PDF]
Adv. Math. 231 (2012), no. 2, 624--650, 2008 We prove Kontsevich's cyclic formality conjecture.
arxiv