deletions | additions       diff --git a/and_rho_equiv_gamma.tex b/and_rho_equiv_gamma.tex  deleted file mode 100644  index 35c9e8b..0000000  --- a/and_rho_equiv_gamma.tex  +++ /dev/null 
...
and $\rho \equiv \gamma ( R - v Z )$, $\zeta \equiv \gamma ( Z - v R )  $. Note that  q^2 + \zeta^2 & = & R^2 - Z^2 + \gamma^2 ( Z^2 - 2 v Z R + v^2 R^2 )\\  & = & \gamma^2 \left( ( 1 - v^2 ) ( R^2 - Z^2 ) + Z^2 - 2 v Z R + v^2 R^2 \right)\\  & = & \gamma^2 ( R^2 - 2 v Z R + v^2 Z^2 )\\  & = & \rho^2.  diff --git a/layout.md b/layout.md  index 09d7de1..49596e3 100644  --- a/layout.md  +++ b/layout.md 
...
ds2___.tex  brace_H__fracMR.tex  This_implies_a_fourm.tex  and_rho_equiv_gamma.tex  the_lapse_function_i.tex  brace_left_gamma_i_j.tex