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General relativity
Black holes
Effects of gravity
Exact solutions in general relativity
Faster-than-light travel
Frames of reference
Gravitational lensing
Gravitational-wave astronomy
Gravitational waves
Lorentzian manifolds
Mathematics of general relativity
Physical horizons
Relativistic paradoxes
Tests of general relativity
Wormhole theory
Hans-Jürgen Treder
Achilles Papapetrou
Lewis Ryder
Myron Mathisson
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