deletions | additions       diff --git a/kinematics.tex b/kinematics.tex  index ab48b3e..08f31e2 100644  --- a/kinematics.tex  +++ b/kinematics.tex 
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Plugging this into equation \ref{energy-momentum-expanded} we get  \begin{equation}  m_{\mu}^2 = m_{pi}^2 m_{\pi}^2  - 2(\pi \cdot \nu_{\mu}) \end{equation}