Math & Science ⇒ Align one formula to the left

[jcc]

Hi.
If I use:

\usepackage[fleqn]{amsmath}

i have formulas aligned to the left.

But how to align just one (or more) math formula (align, etc) to the left, and others to the right.

[gmedina]

From a typographical standpoint, all formulas should keep the same alignment in a document. However, if it's really necessary, you can modify the alignment for a particular equation using the environments provided by the nccmath package.

Take a look at the following simple example:

Code: Select all

\documentclass{article}
\usepackage{amsmath}
\usepackage{nccmath}

\begin{document}

% A centered formula:
\begin{align}
  a &= b\\
    &= c
\end{align}

% A flushed left formula:
\begin{fleqn}
\begin{align}
  a &= b\\
    &= c
\end{align}
\end{fleqn}

% A centered formula:
\begin{align}
  a &= b\\
    &= c
\end{align}

\end{document}

[jcc]

Thank you gmedina.
Just out of curiosity: in your example, how i can flush right (center, left, center, right)?

Best wishes

[gmedina]

For this purpose you can use the flalign environment (or its starred version) provided by the amsmath package:

Code: Select all

\documentclass{article}
\usepackage{amsmath}
\usepackage{nccmath}

\begin{document}

% A centered formula:
\begin{align*}
  a &= b\\
    &= c
\end{align*}

% A flushed left formula:
\begin{fleqn}
\begin{align*}
  a &= b\\
    &= c
\end{align*}
\end{fleqn}

% A centered formula:
\begin{align*}
  a &= b\\
    &= c
\end{align*}

% A flushed right formula:
\begin{flalign*}
   && a &= b\\
   &&    &= c
 \end{flalign*}

\end{document}

But particularly, I find this to be really poor (typographically).

[jcc]

Thank you again. I agree with you: is typographically poor and aesthetically ugly.
However, is very useful for my handouts and homeworks.

Best wishes ,

jcc