deletions | additions       diff --git a/c) Imposing a restriction.tex b/c) Imposing a restriction.tex  index 91a60c4..8a9bbf3 100644  --- a/c) Imposing a restriction.tex  +++ b/c) Imposing a restriction.tex 
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A_1 &= \sum_{k=1}^{\delta(x,i)}\Big[ 2(k - 1) \Big]\\  &= 2\sum_{k=1}^{\delta(x,i)}\Big[ k \Big] - \sum_{k=1}^{\delta(x,i)}\Big[ 1 \Big]\\  &= \delta(x,i)\Big(\delta(x,i) + 1\Big) - \delta(x,i)\\  &= \delta(x,i)^2 \delta(x,i)^2\\  A_2 &= \Big( 2\delta(x,i) - 1 \Big)\Big( i-\delta(x,i) \Big)\\  &= 2i\delta(x,i) + \delta(x,i) - 2\delta(x,i)^2 - i\\  T(i,x) &= A_1 + A_2