deletions | additions       diff --git a/c) Imposing a restriction.tex b/c) Imposing a restriction.tex  index cd0e554..c7c3dcc 100644  --- a/c) Imposing a restriction.tex  +++ b/c) Imposing a restriction.tex 
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&= 2i\delta(x,i) - \delta(x,i)^2 - i\\  &= \begin{cases}  i^2 - i \in \ordo{i^2} & \text{if \delta(x,i) = i}\\  2i\ceil{\frac{x}{c}} - \ceil{\frac{x}{c}}^2 - i & \text{if \delta(x,i) = \frac{x}{a}} \ceil{\frac{x}{c}}}  \end{cases}  \end{align*}  \end{subequations}