# [pdftex] Tilde character in url.

Reinhard Kotucha reinhard.kotucha at web.de
Fri Apr 9 20:08:02 CEST 2010

On 9 April 2010 John Culleton wrote:

> In plain pdftex I am typing the following url:
> \url{http://www.tux.org/~milgram/bookland}
> {http://www.tux.org/~milgram/bookland}
>
> The problem is the tilde character.  TeX persists in treating it
> either as an unbreakable space or as an accent over the following
> character.  The tag \tilde only works in math mode and again it
> wants to be on top of the next character.

The tilde is an active character.

\bgroup\catcode\~=12
\url{http://www.tux.org/~milgram/bookland}
{http://www.tux.org/~milgram/bookland}
\egroup

You can also try \~{}.  The empty group prevents TeX from putting it
over the following character.

Regards,
Reinhard

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