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On the existence of cosmological event horizon
Cosmological horizon strong energy condition positive cosmological constant
2010/3/17
We show that, for general static or axisymmetric stationary spacetimes, a cosmological horizon exists only if $R_{ab}n^{a}n^{b}< 0$ for a hypersurface orthogonal timelike $n^{a}$, at least over some p...