Possible Duplicate:
How to look up a symbol?
When I do $\not>$ in LaTeX it gives me
, however I would like the bar to vertical instead of slanted. How do I do that?
Possible Duplicate:
How to look up a symbol?
When I do $\not>$ in LaTeX it gives me
, however I would like the bar to vertical instead of slanted. How do I do that?
Overprinting symbols or text is possible \ooalign. The following MWE provides \ngrt and \nlst as math relations:

\documentclass{article}
\newcommand{\ngrt}{%
\mathrel{\ooalign{$>$\cr\hidewidth$|$\hidewidth}}%
}
\newcommand{\nlst}{%
\mathrel{\ooalign{$<$\cr\hidewidth$|$\hidewidth}}%
}
\begin{document}
$a\ngrt b\nlst c$
\end{document}
For a quick course in \ooalign, see \subseteq + \circ as a single symbol (“open subset”).
Something like this, using \rlap to typeset bar, but not move the point?
\documentclass{article}
\thispagestyle{empty}
\begin{document}
$a\rlap{\kern.45em$|$}>b$
\end{document}

texdoc symbolsgives\documentclass{article} \usepackage{mathabx} \begin{document} $2\ngtr 3$ \end{document}– cmhughes Jul 24 '12 at 18:47\ngtrdoesn't work, beausemathabxclashes with another package on several symbols. – Mads Ohm Larsen Jul 24 '12 at 19:48