deletions | additions       diff --git a/begin_align_p_i_k__.tex b/begin_align_p_i_k__.tex  index 8d328ca..9595f5d 100644  --- a/begin_align_p_i_k__.tex  +++ b/begin_align_p_i_k__.tex 
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\begin{align*}  p(i,k)&= p(i,j) + |jk|\\  \leq &\leq  t\cdot |ij| + |jk|\\ & t\cdot |ik|  \end{align*}