The “thin sandwich” approach to these equations’ constraints was made practical by J. W. York, who co-names an approach to finding their initial conditions with André Lichnerowicz (“leesh-nair-oh-VEETS”). Chi (“kye”), which equals “gamma to the negative one-third,” can be used to rewrite these equations in the BSSN system. Manuela Campanelli’s team at Brownsville, which created the “moving puncture” method, (10[1])was one of three teams behind a 2005 breakthrough in solving these equations under the ADM formalism. (10[1])Birkhoff’s theorem (10[2])concerns (10[2])the spherical symmetry (10[1])of a solution to these equations (10[2])involving (10[2])a “one minus the quantity ‘r-sub-s (10[1])over r’” term. Despite being nonlinear and second-order, a solution (-5[1])to these equations with a singularity was quickly found by (10[1])Karl Schwarzschild. (10[3]-5[1])For 10 (10[2])points, what equations (10[1])of general relativity (10[1])are named after the (10[1])theory’s creator? (10[1])■END■ (10[2])