deletions | additions       diff --git a/layout.md b/layout.md  index 6d909d3..47d5922 100644  --- a/layout.md  +++ b/layout.md 
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First_step_in_Velocity_Verlet__.tex  Below_is_a_draft_Don__.tex  vec_v_t_Delta_t__.tex  vec_x_t_Delta_t__2.tex