HI here is the latex code

```
\documentclass{sig-alternate}
\usepackage{ctable}
\begin{document}
$G_{CS}(\mathbb{S_c})=
\begin{cases}
\displaystyle\sum_{k=1}^{r} \frac{Gmax(k)-q_k(s)}{Gmax(k)-Gmin(k)}.w_k & if\ Gmax(k) \neq Gmin(k)\\
1 & if\ Gmax(k) = Gmin(k)
\end{cases}$
This is boundary This is boundary This is boundary This is boundary This is boundary This is boundary This is boundary This is boundaryThis is boundary This is boundary This is boundary This is boundary This is boundary This is boundary This is boundary This is boundary
\end{document}
```

And here is the latex

I am using two columns in with ACM SIG Proceedings template http://www.acm.org/sigs/publications/proceedings-templates

The equation has gone out from the boundary, is there a way to make it within the boundary?

One way I can think of is make the space of red circle becomes smaller, and the font in red rectangle becomes smaller, but i am not sure how to achieve it. Furthermore, two multilines of equation are too near(draw by red line) is there a way to seperate it further?

## Best Answer

There are many ways to reduce the place needed by the equation:

`\noindent`

skips the paragraph indenting.`\thinmuskip`

and`\medmuskip`

. Instead of using`\medmuskip=.625\medmuskip`

the expression below with`\muexpr`

also scales the shrink and stretch components andkeepsthem.`\mathit{Gmin}`

(BTW italic or upright?) saves some space, because`Gmin`

is set as word and not as product`G`

*`m`

*`i`

*`n`

with additional spacing.`cases`

environment adds`\quad`

(=`1em`

),`\hspace{-.5em}`

reduces that space.`\small`

, the cases text in`\scriptsize`

.`if`

should be set as word, not as product of`i`

*`f`

:`\text{if}`

.`\cdot`

looks better than`.`

as multiplication sign. The dot is omitted here to save some space, because it is not really needed here.The example file:

## Variant with

`\resizebox`

The sledgehammer method is using

`\resizebox`

to scale the equation down to`\linewidth`

:This can also be combined or replaced with asymmetrical scaling

`\resizebox{\linewidth}{\height}`

or (a nested)`\scalebox{.975}{1}`

. Reducing the horizontal width only avoids small looking fonts. But the asymmetries should be kept as small as possible to avoid the equation looking ugly distorted.And these methods and tricks can be combined, e.g. first reducing the space with the tricks at the beginning and resizing to get the last points.

## Variant with

`max`

and`min`

as subscriptsFollowing Gregorio's suggestion by using

`max`

and`min`

as subscripts, it becomes easier to adjust the width of the equation, e.g.: