deletions | additions       diff --git a/layout.md b/layout.md  index 7b29103..bd69c90 100644  --- a/layout.md  +++ b/layout.md 
...
Inverse_is_also_true_if__.tex  Delta_From_3_vec_a__.tex  Taking_into_account_that_vec__.tex  To_derive_1_we_need__.tex