deletions | additions       diff --git a/section_The_Reformulation_Technique_Basics__.tex b/section_The_Reformulation_Technique_Basics__.tex  index d586452..7aeb48c 100644  --- a/section_The_Reformulation_Technique_Basics__.tex  +++ b/section_The_Reformulation_Technique_Basics__.tex 
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The first case is $$XY = 0$$ which is then represented as   \begin{align*}  Xb + Y(1&-b) = 0\\  \text{which is replaced with}&\\ with}\\  0\leq X&\leq Mb\\  0\leq Y&\leq M(1-b)\\  M&\rightarrow \infty.