Stability of Schwarzschild black holes in fourth-order gravity revisited [PDF]
Yun Soo MyungWe revisit the classical stability of Schwarzschild black hole in fourth-order theories of gravity. On the contrary of the stability of this black hole, it turns out that the linearized perturbations exhibit unstable modes featuring the Gregory-Laflamme instability of five-dimensional black string. This shows clearly an instability of black hole in fourth-order gravity with $\alpha=-\beta/3$.View original: http://arxiv.org/abs/1306.3725
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