deletions | additions       diff --git a/In_practice_to_find_P__.tex b/In_practice_to_find_P__.tex  index 85e92cd..1618cb3 100644  --- a/In_practice_to_find_P__.tex  +++ b/In_practice_to_find_P__.tex 
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\begin{itemize}  \item \textbf{Associativity} \\  $$\forall P,Q,R \in \mathcal{E} \ \ \ \ \ \\ (P \oplus Q) \oplus R=P \oplus (Q \oplus R) $$ \\  We could show that it's true plotting a simple graphic: \end{itemize}