Double arrow with text

[drorata]

I want to produce a double arrow (i.e. an arrow with heads on both
sides) with text on top of the arrow. So far I managed either to have
a right-arrow with the auto-adjusting length, or double-arrow with
fixed length regardless of the text's length...

Any ideas?

[Werner Grundlingh]

The mathtools package, available online via CTAN from:
http://tug.ctan.org/cgi-bin/ctanPackageInformation.py?id=mathtools
has what is called "extensible arrows". For example, you would
probably be interested in
\xleftrightarrow[<sub>]{<sup>}
See p 11 of the package documentation, also available from the above
link.

Werner

[drorata]

Thanks a lot! This is what I was looking for!

There is only one problem though - the typesetting of the arrow is not
100% smooth, and when using the \xLeftrightarrow it looks even worse.
But this is, at least for now, good enough.

Thanks again,
Dror

[Werner Grundlingh]

On Oct 28, 1:38 am, drorata <dror...@gmail.com> wrote:
> Thanks a lot! This is what I was looking for!
>
> There is only one problem though - the typesetting of the arrow is not
> 100% smooth, and when using the \xLeftrightarrow it looks even worse.
> But this is, at least for now, good enough.
>
> Thanks again,
> Dror

Hi Dror,

It may just be the rendering in your PDF/PS viewer. The minimal
example below compiles fine, and produces the output
xleftrightarrow.pdf in the Files section of this forum:

\documentclass{article}
\usepackage{mathtools} \pagestyle{empty}
\begin{document}
This is a test to see whether $\xleftrightarrow{\text{this is long
text}}$ looks okay.

Even this $\xleftrightarrow[\text{this is also very long text}]{}$
looks fine.

And, finally, another test on $\xleftrightarrow[\text{some text}]{\text
{some longer text above}}$.
\end{document}

Werner

[drorata]

Yep, looks pretty good! I don't know what is the reason in my case...
I'm using the package with in the beamer framework, maybe this causes
the problem? I've tried to open the .pdf with both evince and acrobat-
reader, and in both the arrow is not smooth. When it is a double
arrow, it looks even worse.

in any case, the solution so far is good enough!

Thanks a lot,
Dror

[Werner Grundlingh]

On Oct 29, 12:55 am, drorata <dror...@gmail.com> wrote:
> Yep, looks pretty good! I don't know what is the reason in my case...
> I'm using the package with in the beamer framework, maybe this causes
> the problem? I've tried to open the .pdf with both evince and acrobat-
> reader, and in both the arrow is not smooth. When it is a double
> arrow, it looks even worse.
>
> in any case, the solution so far is good enough!
>
> Thanks a lot,
> Dror

Here's another option you could try, using the extpfeil package. It is
also available online via CTAN from:
http://tug.ctan.org/pkg/extpfeil
I have never used it, but perhaps the rendering may be better in your
context.

Werner