deletions | additions       diff --git a/layout.md b/layout.md  index 65ee4f5..68d8d17 100644  --- a/layout.md  +++ b/layout.md 
...
The_position_of_the_textit__.tex  subsection_Gravitational_redshift_For_a__.tex  Now_consider_2_observes_stationary__.tex  When_such_observer_with_4__.tex subsection_Circular_orbit_ddot_r__.tex