deletions | additions       diff --git a/Node.tex b/Node.tex  index a9001d1..26c7b84 100644  --- a/Node.tex  +++ b/Node.tex 
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\begin{equation}  h_i = \|h_i^{fg}\| + \alpha^{bg} \alpha_{bg}  \|h_i^{bg}\| \end{equation}