Homework 1

Homework in Latex

\begin{align}
v_{j}v_{j,i}
&=
\frac{1}{2}\left(v_j v_j\right)_{,i} - \epsilon_{ijk}v_{j}\epsilon_{klm}v_{l,m}\\
&= \frac{1}{2}\left(2v_{j}v_{j,i}\right) - \left(v_{j}v_{i,j}-v_{j}v_{j,i}\right)\\
&= \boxed{v_{j}v_{j,i} 

\overbrace{- v_{j}v_{i,j} + v_{j}v_{j,i}}^\text{must be 0}}.
\end{align}

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