Results 51 to 60 of about 30,041 (97)

Extensions and fill-ins with nonnegative scalar curvature

open access: yes, 2013
Motivated by the quasi-local mass problem in general relativity, we apply the asymptotically flat extensions, constructed by Shi and Tam in the proof of the positivity of the Brown--York mass, to study a fill-in problem of realizing geometric data on a 2-
Jauregui, Jeffrey   +2 more
core   +1 more source

Prescribing Scalar Curvature on Sn and Related Problems, Part I

open access: yesJournal of Differential Equations, 1995
AbstractLet (Sn, g0) be the standard n-sphere. The following question was raised by L. Nirenberg. Which function K(x) on S2 is the Gauss curvature of a metric g on S2 conformally equivalent to g0? Naturally one may ask a similar question in higher dimensional case, namely, which function K(x) on Sn is the scalar curvature of a metric g on Sn ...
openaire   +1 more source

Prescribing integral curvature equation [PDF]

open access: yes, 2015
In this paper we formulate new curvature functions on $\mathbb{S}^n$ via integral operators. For certain even orders, these curvature functions are equivalent to the classic curvature functions defined via differential operators, but not for all even ...
Zhu, Meijun
core  

On the existence of solutions of prescribing scalar curvature problem

open access: yesTsukuba Journal of Mathematics, 2000
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire   +2 more sources

Conformal metrics of prescribed scalar curvature on 4-manifolds: the degree zero case

open access: yesArabian Journal of Mathematics, 2017
In this paper, we consider the problem of existence and multiplicity of conformal metrics on a Riemannian compact 4-dimensional manifold (M4,g0)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage ...
M. Ahmedou, H. Chtioui
semanticscholar   +1 more source

Geometric flows and (some of) their physical applications

open access: yes, 2005
The geometric evolution equations provide new ways to address a variety of non-linear problems in Riemannian geometry, and, at the same time, they enjoy numerous physical applications, most notably within the renormalization group analysis of non-linear ...
Bakas, I.
core  

The Scalar Curvature Problem on the Four Dimensional Half Sphere

open access: yes, 2003
In this paper, we consider the problem of prescribing the scalar curvature under minimal boundary conditions on the standard four dimensional half sphere. We provide an Euler-Hopf type criterion for a given function to be a scalar curvature to a metric
Ahmedou, M. Ould   +2 more
core   +4 more sources

Geometric Analysis and General Relativity

open access: yes, 2005
This article discusses methods of geometric analysis in general relativity, with special focus on the role of "critical surfaces" such as minimal surfaces, marginal surface, maximal surfaces and null surfaces.Comment: to appear in Elsevier Encyclopedia ...
Andersson, Lars
core  

The Prescribed Ricci Curvature Problem on Homogeneous Spaces with Intermediate Subgroups

open access: yes, 2017
Consider a compact Lie group $G$ and a closed subgroup $H0$ such that the Ricci curvature of $g$ equals $cT$ for a given $T\in\mathcal M$. This condition is also necessary if the isotropy representation of $M$ splits into two inequivalent irreducible ...
Gould, Mark, Pulemotov, Artem
core  

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