I have a set of aligned equations that I would like to provide an \implies
for down the left hand side. I used this originally:
\begin{align}
(x-1)^2 &= -1 \\
x-1 &= \pm i \\
x &= 1 \pm i
\end{align}
which results in a centred set of equations. Then added the \implies
in a left column:
\begin{align}
& & (x-1)^2 &= -1 \\
& \implies & x-1 &= \pm i \\
& \implies & x &= 1 \pm i
\end{align}
However now the entire environment is shifted to the right. Is there a way to keep the original alignment?
Best Answer
If you want exactly the same alignment as before, but this time with
\implies
, this does the trick:The idea here is to duplicate the width of
\implies
on the left with a\phantom{\implies}
on the right, thereby evenly spacing the equation/environment again.