deletions | additions       diff --git a/As_a_brief_introduction_the__.tex b/As_a_brief_introduction_the__.tex  index a3c8607..71eab27 100644  --- a/As_a_brief_introduction_the__.tex  +++ b/As_a_brief_introduction_the__.tex 
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\begin{flushleft}  \begin{align*}  S_2 &= <[I(r,v) - I(r_2,v_2)]>\\  &= S_2_(noise) S_2_noise  \end{align*}  \end{flushleft}