04. General relativity and gravitation (for relativistic cosmology,
see 98.80.H)
04.20.-q Classical general relativity (see also 02.40 Geometry and topology)
04.20.Cv Fundamental problems and general formalism
04.20.Dw Singularities and cosmic censorship
04.20.Ex Initial value problem, existence and uniqueness of solutions
04.20.Fy Canonical formalism, Lagrangians, and variational principles
04.20.Gz Spacetime topology, causal structure, spinor structure
04.20.Ha Asymptotic structure
04.20.Jb Exact solutions
04.25.-g Approximation methods; equations of motion
04.25.Dm Numerical relativity
04.25.Nx Post-Newtonian approximation; perturbation theory; related
approximations
04.30.-w Gravitational waves: theory
04.30.Db Wave generation and sources
04.30.Nk Wave propagation and interactions
04.40.-b Self-gravitating systems; continuous media and classical fields in
curved spacetime
04.40.Dg Relativistic stars: structure, stability, and oscillations (for
relativistic astrophysics, see 95.30.S)
04.40.Nr Einstein-Maxwell spacetimes, spacetimes with fluids, radiation or
classical fields
04.50.+h Gravity in more than four dimensions, Kaluza-Klein theory, unified
field theories, alternative theories of gravity (see also 11.25.M
Compactification and four-dimensional models)
04.60.-m Quantum gravity (see also 98.80.H Quantum cosmology)
04.60.Ds Canonical quantization
04.60.Gw Covariant and sum-over-histories quantization
04.60.Kz Lower dimensional models; minisuperspace models
04.60.Nc Lattice and discrete methods
04.62.+v Quantum field theory in curved spacetime
04.65.+e Supergravity (see also 12.60.J Supersymmetric models)
04.70.-s Physics of black holes (for astrophysics of black holes, see 97.60.L)
04.70.Bw Classical black holes
04.70.Dy Quantum aspects of black holes, evaporation, thermodynamics
04.80.-y Experimental studies of gravity
04.80.Cc Experimental tests of gravitational theories
04.80.Nn Gravitational wave detectors and experiments
(see also 95.55.Y in Astronomical instrumentation)
04.90.+e Other topics in general relativity and gravitation