Results 21 to 30 of about 381,931 (282)

Hypersurfaces with constant mean curvature and two principal curvatures in n+1 [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2004
In this paper we consider compact oriented hypersurfaces M with constant mean curvature and two principal curvatures immersed in the Euclidean sphere.
Luis J. Alías   +2 more
doaj   +1 more source

Superharmonicity of curvatures for surfaces of constant mean curvature [PDF]

open access: yesPacific Journal of Mathematics, 1992
The article deals with the superharmonicity of some curvatures (the scalar curvature \(R\), the Gauss-Kronecker curvature \(K\), the \(\nu\)-th mean curvature \({K}_ \nu\), the level curvature \(L\)) of hypersurfaces of constant mean curvature in \(\mathbb{R}^ n\). For instance, it is proved that for a hypersurface of positive sectional curvatures \(R\)
openaire   +2 more sources

On the global evolution problem in 2+1 gravity [PDF]

open access: yes, 1996
Existence of global CMC foliations of constant curvature 3-dimensional maximal globally hyperbolic Lorentzian manifolds, containing a constant mean curvature hypersurface with $\genus(\Sigma) > 1$ is proved.
Anthony J. Tromba   +7 more
core   +3 more sources

Constant mean curvature surfaces with circular boundary in R³

open access: yesAnais da Academia Brasileira de Ciências, 2006
In this work we deal with surfaces immersed in R³ with constant mean curvature and circular boundary. We improve some global estimates for area and volume of such immersions obtained by other authors.
Pedro A. Hinojosa
doaj   +1 more source

Graphs with constant mean curvature in the 3-hyperbolic space

open access: yesAnais da Academia Brasileira de Ciências, 2002
In this work we will deal with disc type surfaces of constant mean curvature in the three dimensional hyperbolic space which are given as graphs of smooth functions over planar domains.
PEDRO A. HINOJOSA
doaj   +1 more source

Constant mean curvature surfaces [PDF]

open access: yesSurveys in Differential Geometry, 2016
In this article we survey recent developments in the theory of constant mean curvature surfaces in homogeneous 3-manifolds, as well as some related aspects on existence and descriptive results for $H$-laminations and CMC foliations of Riemannian $n$-manifolds.
H. Meeks III, William   +2 more
openaire   +5 more sources

Simons type formulas for surfaces in Sol3 and applications

open access: yesBulletin of Mathematical Sciences, 2023
We compute the Laplacian of the squared norm of the second fundamental form of a surface in Sol3 and then use this Simons type formula to obtain some gap results for compact constant mean curvature surfaces of this space.
Dorel Fetcu
doaj   +1 more source

Constant Mean Curvature Spacelike Surfaces in Lorentzian Warped Products

open access: yesAdvances in Mathematical Physics, 2015
We characterize the spacelike slices of a Lorentzian warped product as the only constant mean curvature spacelike surfaces under suitable geometrical and physical assumptions.
Juan A. Aledo, Rafael M. Rubio
doaj   +1 more source

Cosmological spacetimes not covered by a constant mean curvature slicing [PDF]

open access: yes, 1997
We show that there exist maximal globally hyperbolic solutions of the Einstein-dust equations which admit a constant mean curvature Cauchy surface, but are not covered by a constant mean curvature foliation.Comment: 11 ...
Alan D Rendall   +14 more
core   +2 more sources

Weighted Cheeger constant and first eigenvalue lower bound estimates on smooth metric measure spaces

open access: yesAdvances in Difference Equations, 2021
We establish new eigenvalue inequalities in terms of the weighted Cheeger constant for drifting p-Laplacian on smooth metric measure spaces with or without boundary.
Abimbola Abolarinwa   +2 more
doaj   +1 more source

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