04.00.00 General relativity and gravitation (for astrophysical aspects, see 95.30.Sf Relativity and gravitation; for relativistic aspects of cosmology, see 98.80.Jk); Special relativity, see 03.30.+p
- 04.20.-q Classical general relativity (see also 02.40.-k Geometry, differential geometry, and topology)
- 04.25.-g Approximation methods; equations of motion (1)
- 04.30.-w Gravitational waves (see also 04.80.Nn Gravitational wave detectors and experiments)
- 04.40.-b Self-gravitating systems; continuous media and classical fields in curved spacetime
- 04.50.-h Higher-dimensional gravity and other theories of gravity (see also 11.25.Mj Compactification and four-dimensional models, 11.25.Uv D branes) (1)
- 04.60.-m Quantum gravity (see also 11.25.-w Strings and branes)
- 04.62.+v Quantum fields in curved spacetime
- 04.65.+e Supergravity (see also 12.60.Jv Supersymmetric models)
- 04.70.-s Physics of black holes (see also 97.60.Lf-in astronomy)
- 04.80.-y Experimental studies of gravity
- 04.90.+e Other topics in general relativity and gravitation (restricted to new topics in section 04)