deletions | additions       diff --git a/physical model1.tex b/physical model1.tex  index dd361f4..38fc7a8 100644  --- a/physical model1.tex  +++ b/physical model1.tex 
...
Here, we get our inspiration from Boids \cite{boids}, and define the following axioms for movement of sheep:  \begin{enumerate}  \item [Axiom \begin{description}  \item[Axiom  1] Sheep move away from dogs when sufficiently close. \item [Axion \item[Axion  2] When two sheep are very close to each other, they want more space and move away. \item [Axiom \item[Axiom  3] When two sheep are neither too close, nor too far, they flock together. \end{enumerate} \end{description}