Results 141 to 150 of about 409,873 (273)

Metrics of negative Ricci curvature on ${\rm SL}(n,\,{\bf R}),$ $n\geq 3$ [PDF]

, 1982
Maria Luiza Leite, Isabel Dotti Miatello
openalex   +1 more source

On the Ricci curvature of a hypersurface in a sphere

MATHEMATICA SCANDINAVICA, 1998
\textit{P. F. Leung} [Bull. Aust. Math. Soc. 27, 215-219 (1983; Zbl 0507.53033)]\ gave an estimate of the Ricci curvature of a complete hypersurface in an \((n+1)\)-dimensional Euclidean space \(E^{n+1}\). In the present paper, the author extends Leung's result to the spherical case.
openaire   +4 more sources

On the Ricci Curvature of Normal-Metric Contact Pair Manifolds

Journal of New Theory, 2021
In this study, we work on normal-metric contact pair manifolds under certain conditions related to the Ricci curvature. We obtain some results for generalized quasi-Einstein normal-metric contact pair manifolds.
Ramazan Sarı, İnan Ünal
doaj  

Ricci Curvature-Based Semi-Supervised Learning on an Attributed Network. [PDF]

Entropy (Basel), 2021
Wu W, Hu G, Yu F.
europepmc   +1 more source

A Diameter Pinching Sphere Theorem for Positive Ricci Curvature [PDF]

, 1989
Jyh-Yang Wu
openalex   +1 more source

Closed time-like curves in f(R,A) modified gravity theory

Nuclear Physics B
In this manuscript, we investigate solutions that allow closed time-like curves (CTCs) in general relativity (GR) within the framework of a modified gravity theory. We consider here an alternative theory recently proposed in gravity theories known as f(R,
F. Ahmed, J.C.R. de Souza, A.F. Santos
doaj   +1 more source

Almost Einstein manifolds of negative Ricci curvature [PDF]

, 1990
Maung Min-Oo
openalex   +1 more source

Complete Kähler manifolds with zero Ricci curvature. I [PDF]

, 1990
Gang Tian, Shing-Tung Yau
openalex   +1 more source

On complete manifolds of nonnegative $k$th-Ricci curvature [PDF]

, 1993
Zhong Min Shen
openalex   +1 more source

Compact cosymplectic manifolds with transversally positive definite Ricci tensor [PDF]

Rendiconti di Matematica e delle Sue Applicazioni, 1997
In this paper we study compact cosymplectic manifolds with transversally positive definite Ricci tensor, that is, compact cosymplectic manifolds such that its Ricci tensor is positive definite on vector fields orthogonal to the Reeb vector field of the ...
Manuel de León, Juan C. Marrero
doaj