deletions | additions       diff --git a/Schwarzschild.tex b/Schwarzschild.tex  index 88b1bcf..8f400cb 100644  --- a/Schwarzschild.tex  +++ b/Schwarzschild.tex 
...
The four-Riemann tensor in spherical polars has non-zero components:  %  \[  \Rm_{t r t r} \Rmfour_{0 1 0 1}  = \frac{2 M}{R^3} \]  The three-Ricci tensor is, in spherical polars,