In general relativity, an exact solution is a solution of the Einstein field equations whose derivation does not invoke simplifying assumptions, though...

Non-exact solutions in general relativity are solutions of Albert Einstein's field equations of general relativity which hold only approximately. These...

in a Lorentzian manifold is a region in which the Einstein tensor vanishes. Vacuum solutions are a special case of the more general exact solutions in...

is an exact solution of the Einstein field equations of general relativity; these equations are highly non-linear, which makes exact solutions very difficult...

The two-body problem in general relativity (or relativistic two-body problem) is the determination of the motion and gravitational field of two bodies...

general asymptotically flat and stationary solution of the Einstein–Maxwell equations in general relativity that describes the spacetime geometry in the...

In general relativity, the pp-wave spacetimes, or pp-waves for short, are an important family of exact solutions of Einstein's field equation. The term...

In Einstein's theory of general relativity, the Schwarzschild metric (also known as the Schwarzschild solution) is an exact solution to the Einstein field...

In general relativity, a dust solution is a fluid solution, a type of exact solution of the Einstein field equation, in which the gravitational field...

into the in-universe science. EmDrive Exact solutions in general relativity (for more on the sense in which the Alcubierre spacetime is a solution) IXS Enterprise...