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arXiv 0806.0669gr-qc
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爱因斯坦方程宇宙学解约化体积的渐近谱

On the asymptotic spectrum of the reduced volume in cosmological solutions of the Einstein equations

Martin Reiris

摘要:

假设S是一个具有非正Yamabe不变量的紧致三流形。我们证明了在S上的任意长时间常数平均曲率Einstein流中,在宇宙尺度上具有有界的C^α时空曲率,约化体积(-k/3)^{3}<$(g(k))(g(k)是演化的空间三度规,k是平均曲率)单调地向宇宙归一化流衰减的几何化的体积值衰减。在更基本的条件下,在给定的假设条件下,在注入半径长期塌陷(即趋于零)的区域中存在体积塌陷。我们猜想在上述曲率假设下,Thurston几何化是唯一的全局吸引子。我们在一些特殊的情况下验证它。

英文摘要:

Say S is a compact three-manifold with non-positive Yamabe invariant. We prove that in any long time constant mean curvature Einstein flow over S, having bounded C^α space-time curvature at the cosmological scale, the reduced volume (-k/3)^{3}Vol(g(k)) (g(k) is the evolving spatial three-metric and k the mean curvature) decays monotonically towards the volume value of the geometrization in which the cosmologically normalized flow decays. In more basic terms, under the given assumptions, there is volume collapse in the regions where the injectivity radius collapses (i.e. tends to zero) in the long time. We conjecture that under the curvature assumption above the Thurston geometrization is the unique global attractor. We validate it in some special cases.

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