# [Tugindia] Aligning equations

Sreejith Pulloor sreejithpk at gmail.com
Mon Nov 28 18:18:05 CET 2005

TUG,

I would like to align 4 equations nicely. the problem is first
equation is very long and run over 2 lines and other equations are
short.
So i used the split option to split the first equation and but am
unable to align them properly.

\begin{equation*}
\begin{split}
A(u,v) & = \sum\limits_E\int_\Omega (\nabla u) \cdot (\nabla v) -
\sum\limits_{\Gamma_{\text{int}}} \int_\Gamma \langle \nabla u \rangle
n \cdot [v] + \epsilon \sum \int_\Gamma \langle \nabla v \rangle n
\cdot [u]\\
& - \sum \int_{{\Gamma}_{D}} \nabla u~n \cdot v + \epsilon \sum
\int_{\Gamma_{D}} \nabla v~n \cdot u\\
\end{split}
\end{equation*}
\begin{align*}
B(u,q) & = - \sum \int_\Omega q \nabla \cdot u + \sum \int_\Gamma
\langle q \rangle [u] \cdot n\\
B(v,p) & = - \sum \int_\Omega p \nabla \cdot v + \sum \int_\Omega
\langle p \rangle [v] \cdot n\\
J(u,v) & = \sum \frac{\sigma_e}{|{e}|}\int_\Gamma [u] \cdot [v]
\end{align*}

what I would like to have the equations to align something like below:

A(u,v)     = ........................
.........................
.........................
B(u,q)     = .........................
B(v,p)     = .........................
J(u,v)     = .........................