Schwarzschild's solution of it gives gravity outside a spherical mass.
Spherically symmetric solutions to this equation must be static, according to one of Birkhoff's theorems. Kasner dusts satisfy this statement as an example of a perfect fluid with vanishing pressure. A constant factor of eight pi times big G over c to the fourth appears in this equation. The Kerr-Newman metric satisfies this equation when charge and angular momentum are nonzero. The FLRW metric is an isotropic solution to it. In this equation, the metric tensor multiplies the cosmological constant, a term which this equation's namesake claimed was his "biggest blunder". Schwarzschild's solution of it gives gravity outside a spherical mass. For 10 points, name this set of ten equations often written in tensor form, created by the physicist who theorized general relativity.
Spherically symmetric solutions to this equation must be static, according to one of Birkhoff's theorems.
Einstein's field equations [or EFE]