Absolute horizon
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- Black Holes in General Relativity
- Closed Timelike Curves and Causality Violation
- Spherically Symmetric Static Black Holes in Einstein-Aether Theory
- Spherically Symmetric Static Black Holes in Einstein-Aether Theory
- Acoustic Black Holes: Horizons, Ergospheres, and Hawking Radiation
- Black Holes and Black Hole Thermodynamics Without Event Horizons
- Causal Structure of Acoustic Spacetimes 2 1 Introduction
- TIME, CLOSED TIMELIKE CURVES and CAUSALITY Centro De Astronomia E Astrofısica Da Universidade De Lisboa Campo Grande, Ed. C8 17
- Causal Structure of Acoustic Spacetimes
- The Kerr Spacetime: a Brief Introduction Matt Visser 2