deletions | additions       diff --git a/section_0_1_begin_itemize__.tex b/section_0_1_begin_itemize__.tex  index abe5a96..a663d38 100644  --- a/section_0_1_begin_itemize__.tex  +++ b/section_0_1_begin_itemize__.tex 
...
0 & j_1 < j_2 \\   1 & j_1 > j_2  \end{matrix}\right.\\  Err = \sum_{v\neq w \\ v,w\epsilon w;v,w\epsilon  \{X\}\{Y\}}Err_{v,w} $$  \end{definition}