Giovanni Calvaruso, Irene I. Onnis, Lorenzo Pellegrino, Daria Uccheddu
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引用次数: 0
Abstract
We consider the Anti-de Sitter space \(\mathbb {H}^3_1\) equipped with Berger-like metrics, that deform the standard metric of \(\mathbb {H}^3_1\) in the direction of the hyperbolic Hopf vector field. Helix surfaces are the ones forming a constant angle with such vector field. After proving that these surfaces have (any) constant Gaussian curvature, we achieve their explicit local description in terms of a one-parameter family of isometries of the space and some suitable curves. These curves turn out to be general helices, which meet at a constant angle the fibers of the hyperbolic Hopf fibration.
我们认为反德西特空间(Anti-de-Sitter space \mathbb {H}^3_1\)配备有类似伯格的度量,这些度量在双曲霍普夫(Hopf)向量场的方向上变形了标准度量。螺旋曲面就是与这种向量场形成恒定角度的曲面。在证明这些曲面具有(任意)恒定高斯曲率之后,我们用空间等轴线的单参数族和一些合适的曲线实现了对它们的明确局部描述。这些曲线原来是一般的螺旋线,它们与双曲霍普夫纤维的纤维以恒定角度相交。