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gr-qc2018★ 9 cited
Evanescent ergosurface instability
Joseph Keir
Some exotic compact objects possess evanescent ergosurfaces: timelike submanifolds on which a Killing vector field, which is timelike everywhere else, becomes null. We show that an…
math.AP2018★ 21 cited
The weak null condition and global existence using the p-weighted energy method
Joseph Keir
We prove global existence for solutions arising from small initial data for a large class of quasilinear wave equations satisfying the `weak null condition' of Lindblad and Rodnian…