deletions | additions       diff --git a/kinematics.tex b/kinematics.tex  index c4385c3..67f9011 100644  --- a/kinematics.tex  +++ b/kinematics.tex 
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\begin{equation}  \begin{split}  \mathbf{\pi^{+}} &= (m_{\pi} , 0, 0, 0) \\  \mathbf{\nu_{\mu}} &= (E_{\nu}, E_{\nu} \sin \theta, 0, E_{\nu} \cos \theta)  \end{split}  \end{equation}