A. Brasil

activity

20062015

most citedA characterization of quadric constant mean curvature hypersurfaces of spheres

17 citations · 17 across the 2 of their papers we have counts for

collaborators

3 papers

math.DG2015

Einstein $4 -$ Manifolds and Nonpositive Isotropic Curvature

Aldir Brasil, Ezio Costa, Feliciano Vitorio

This note is devoted to study the implications of nonpositive isotropic curvature and negative Ricci curvature for Einstein $4 -$ Manifolds.

math.DG2008★ 17 cited

A characterization of quadric constant mean curvature hypersurfaces of spheres

Luis J. Alias, Aldir Brasil, Oscar Perdomo

Let $ϕ : M \to S^{n + 1} \subset R^{n + 2}$ be an immersion of a complete $n$ -dimensional oriented manifold. For any $v \in R^{n + 2}$ , let us denote by $\ell_v:M\to\m…

math.DG2006

Stability of Spacelike Hypersurfaces in Foliated Spacetimes

A. Barros, A. Brasil, A. Caminha

We show that a given $x : M^{n} \to M ˉ^{n + 1} = I \times_{ϕ} F^{n}$ closed spacelike hypersurface with constant mean curvature $H$ and warping function $ϕ$ satisfying ϕ''\geq \ma\{Hϕ'',0\…

Einstein 4−Manifolds and Nonpositive Isotropic Curvature

A characterization of quadric constant mean curvature hypersurfaces of spheres

Stability of Spacelike Hypersurfaces in Foliated Spacetimes

Einstein $4 -$ Manifolds and Nonpositive Isotropic Curvature