Results 41 to 50 of about 581 (202)
Indefinite Almost Paracontact Metric Manifolds
International Journal of Mathematics and Mathematical Sciences, 2010 We introduce the concept of (ε)-almost paracontact manifolds, and in particular, of (ε)-para-Sasakian manifolds. Several examples are presented. Some typical identities for curvature tensor and Ricci tensor of (ε)-para Sasakian manifolds are obtained. We
Mukut Mani Tripathi +3 more
doaj +1 more source
Examples of asymptotically conical Ricci-flat Kähler manifolds [PDF]
Mathematische Zeitschrift, 2009 32 pages, 1 figure Some material added on embeddings of cones and some minor corrections ...
openaire +2 more sources
Complete Ricci-flat K�hler manifolds of infinite topological type
Communications in Mathematical Physics, 1989 \textit{G. Gibbons} and \textit{S. Hawking} [Gravitational multi-instantons, Phys. Lett. B 78, 430--432 (1978)] constructed families of complete Ricci- flat Kähler metrics on a class of non-compact 4-manifolds which are asymptotically locally Euclidean in a specified sense. Another description of these metrics was given by \textit{N.
Anderson, Michael T. +2 more
openaire +3 more sources
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 +2 more
doaj +1 more source
Curvature analysis of concircular trajectories in doubly warped product manifolds
AIMS MathematicsThe 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 +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
Degree theory for 4‐dimensional asymptotically conical gradient expanding solitons
Communications on Pure and Applied Mathematics, EarlyView.Abstract We develop a new degree theory for 4‐dimensional, asymptotically conical gradient expanding solitons. Our theory implies the existence of gradient expanding solitons that are asymptotic to any given cone over S3$S^3$ with non‐negative scalar curvature. We also obtain a similar existence result for cones whose link is diffeomorphic to S3/Γ$S^3/\
Richard H. Bamler, Eric Chen
wiley +1 more source
On the geometry of generalized nonholonomic Kenmotsu manifolds
Дифференциальная геометрия многообразий фигур, 2022 The concept of a generalized nonholonomic Kenmotsu manifold is introduced. In contrast to the previously defined nonholonomic Kenmotsu manifold, the manifold studied in the article is an almost normal almost contact metric manifold of odd rank.
A.V. Bukusheva
doaj +1 more source
Remarks on derived equivalences of Ricci-flat manifolds [PDF]
Mathematische Zeitschrift, 2009 25 ...
Huybrechts, Daniel +1 more
openaire +4 more sources