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Asymptotically hyperbolic normalized Ricci flow and rotational symmetry

机译:渐近双曲线标准化的RICCI流量和旋转对称

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We consider the normalized Ricci flow evolving from an initial metric which is conformally compactifiable and asymptotically hyperbolic. We show that there is a unique evolving metric which remains in this class, and that the flow exists up to the time where the norm of the Riemann tensor diverges. Restricting to initial metrics which belong to this class and are rotationally symmetric, we prove that if the sectional curvature in planes tangent to the orbits of symmetry is initially nonpositive, the flow starting from such an initial metric exists for all time. Moreover, if the sectional curvature in planes tangent to these orbits is initially negative, the flow converges at an exponential rate to standard hyperbolic space. This restriction on sectional curvature automatically rules out initial data admitting a minimal hypersphere.
机译:我们考虑从初始指标演变的归一化的RICCI流,这是一种具有浓缩和渐近的双曲线的初始指标。 我们表明,在这一类中仍有一种独特的不断变化的指标,并且流量存在于riemann张量发散的规范的时间。 限制属于该类的初始度量并且是旋转对称的,我们证明,如果对对称轨道的平面中的截面曲率最初是非叠性的,则存在从这种初始度量开始的流程。 此外,如果对这些轨道的平面中的截面曲率最初是负的,则流量会以指数速率收敛到标准双曲空间。 这种对截面曲率的限制自动规定了承认最小超短的初始数据。

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