[Tex/LaTex] pdflatex and \hyphenation

Question

Here is a fairly short latex file.

\documentclass[12pt]{amsart}
\newcommand{\calG}{\mathcal{G}}
\newcommand{\calP}{\mathcal{P}}
\hyphenation{lem-ma none-the-less un-pa-ram-e-ter-ized}
\begin{document}
\subsection{Projection to holes is coarsely Lipschitz}
The following lemma is used repeatedly throughout the paper.
\begin{itemize}
\item
for any hole $X$ for $\calG$, the projection $\pi_X(\calP)$ is an
$A$--unparameterized quasi-geodesic and
\item
foobar.
\end{itemize}
\end{document}

When I use pdflatex (pdfTeX 3.1415926-1.40.11-2.2 (TeX Live 2010/Fink))
I get a pair of overfull hbox errors. If I replace lemma in the body by lem\-ma and replace unparameterized by unparame\-terized then the warnings go away. Suggestions?

Answer 1

Set \righthyphenmin to 2, because amsart uses the value 3. Then lemma will be hyphenated. And words including a dash are not hyphenated. Insert a \hskip0pt. See example.

\documentclass[12pt]{amsart}
\newcommand{\calG}{\mathcal{G}}
\newcommand{\calP}{\mathcal{P}}
\righthyphenmin=2
\begin{document}
\subsection{Projection to holes is coarsely Lipschitz}
The following lemma is used repeatedly throughout the paper.
\begin{itemize}
\item
for any hole $X$ for $\calG$, the projection $\pi_X(\calP)$ is an
$A$--\hskip0pt{}unparameterized quasi-geodesic and
\item
foobar.
\end{itemize}
\end{document}