Results 51 to 60 of about 28,626 (211)

A (CHR)3-flat trans-Sasakian manifold

Pracì Mìžnarodnogo Geometričnogo Centru, 2019
In [4] M. Prvanovic considered several curvaturelike tensors defined for Hermitian manifolds. Developing her ideas in [3], we defined in an almost contact Riemannian manifold another new curvaturelike tensor field, which is called a contact ...
Koji Matsumoto
doaj   +1 more source

Application of the Generalized Bochner Technique to the Study of Conformally Flat Riemannian Manifolds

Mathematics, 2021
In this article, we discuss the global aspects of the geometry of locally conformally flat (complete and compact) Riemannian manifolds. In particular, the article reviews and improves some results (e.g., the conditions of compactness and degeneration ...
Josef Mikeš, Vladimir Rovenski, Sergey Stepanov, Irina Tsyganok   +3 more
doaj   +1 more source

K\"ahler currents and null loci [PDF]

, 2015
We prove that the non-Kahler locus of a nef and big class on a compact complex manifold bimeromorphic to a Kahler manifold equals its null locus. In particular this gives an analytic proof of a theorem of Nakamaye and Ein-Lazarsfeld-Mustata-Nakamaye-Popa.
Collins, Tristan C., Tosatti, Valentino
core   +1 more source

Some Curvature Conditions on a Para-Sasakian Manifold with Canonical Paracontact Connection

International Journal of Mathematics and Mathematical Sciences, 2012
We study canonical paracontact connection on a para-Sasakian manifold. We prove that a Ricci-flat para-Sasakian manifold with respect to canonical paracontact connection is an η-Einstein manifold.
Bilal Eftal Acet, Erol Kılıç, Selcen Yüksel Perktaş   +2 more
doaj   +1 more source

Yang-Mills Instantons from Gravitational Instantons

, 2011
We show that every gravitational instantons are SU(2) Yang-Mills instantons on a Ricci-flat four manifold although the reverse is not necessarily true. It is shown that gravitational instantons satisfy exactly the same self-duality equation of SU(2) Yang-
Oh, John J., Park, Chanyong, Yang, Hyun Seok   +2 more
core   +1 more source

The Morrison-Kawamata Cone Conjecture and Abundance on Ricci flat manifolds [PDF]

arXiv: Algebraic Geometry, 2016
the final version, to appear in the proceedings of the conference Uniformization, Riemann-Hilbert Correspondence, Calabi-Yau manifolds, and Picard-Fuchs Equations, held at the Institut Mittag-Leffler, July ...
Vladimir Lazić, Thomas Peternell, Keiji Oguiso   +2 more
openaire   +2 more sources

Anti-de Sitter massless scalar field spacetimes in arbitrary dimensions

, 2012
We consider $d$-dimensional static spacetimes in Einstein gravity with a cosmological constant in the presence of a minimally coupled massless scalar field.
Cristián Martínez, I. Z. Fisher, N. Bocharova, S. S. Gubser, S. W. Hawking, Sebastián García Sáenz   +5 more
core   +1 more source

Curvature analysis of concircular trajectories in doubly warped product manifolds

AIMS Mathematics
The aim of this research paper was to explore the various characteristics of the doubly warped product manifold, focusing particularly on aspects such as the Hessian, Riemannian curvature, Ricci curvature, and concircular curvature tensor components.
Fahad Sikander, Tanveer Fatima , Sharief Deshmukh, Ayman Elsharkawy   +3 more
doaj   +1 more source

Numerical metrics, curvature expansions and Calabi-Yau manifolds

Journal of High Energy Physics, 2020
We discuss the extent to which numerical techniques for computing approximations to Ricci-flat metrics can be used to investigate hierarchies of curvature scales on Calabi-Yau manifolds.
Wei Cui, James Gray
doaj   +1 more source

On the possibility of a novel (A)dS/CFT relationship emerging in Asymptotic Safety

Journal of High Energy Physics, 2022
Quantum Einstein Gravity (QEG), nonperturbatively renormalized by means of a certain asymptotically safe renormalization group (RG) trajectory, is explored by solving its scale dependent effective field equations and embedding the family of emerging 4 ...
Renata Ferrero, Martin Reuter
doaj   +1 more source