[texhax] problem with a defined command

Philip Taylor P.Taylor at Rhul.Ac.Uk
Fri Jan 17 15:38:47 CET 2014

Victor Ivrii wrote:

> Look at this abstract found after of 5 min of random check:
>
> http://arxiv.org/abs/0806.3141

Well, I would have looked at the source, had I been allowed to,
but the source link takes me to :

http://arxiv.org/e-print/0806.3141v2

which my system does not recognise as being a gzipped tar (.tar.gz)
file, amd since Arxiv will also not allow me to Wget it, I cannot
check what MIME type it has ...

Anyhow, as I said earlier, "this one will run and run".  Let's
draw a line underneath it now :

\hrule

No, that won't work : %LATEX-F-PARSERROR, unrecognised command "\hrule".