Einstein discovered tha field equations of general relativity, which relate tha presence of matta n' tha curvature of spacetime n' is named afta his muthafuckin ass. Da Einstein field equations is a set of 10 simultaneous, non-linear, differential equations. Da solutionz of tha field equations is tha componentz of tha metric tensor of spacetime fo' realz. A metric tensor raps on some geometry of spacetime. Da geodesic paths fo' a spacetime is calculated from tha metric tensor.