deletions | additions       diff --git a/layout.md b/layout.md  index 0f65bae..6d909d3 100644  --- a/layout.md  +++ b/layout.md 
...
Below_is_a_draft_Don__.tex  vec_v_t_Delta_t__.tex  vec_x_t_Delta_t__2.tex  vec_x_t_vec_x__.tex