Mathmode - Does not Render

[willsower]

The following mathmode does not render. This is an enhancement, not a priority.

\begin{eqnarray}
du &=& T\ ds -P\ dv, \qquad \mbox{first law.}\label{fl}\\
ds &\ge& {\delta q \over T}.\qquad  \qquad \mbox{second law.} \label{sl}\\
dd &\le& {\delta q \over T}.\qquad  \qquad \mbox{third law.} \label{tl}
\end{eqnarray}

[willsower]

Not necessary