# [texhax] table of equations issue

burlen burlen at apollo.sr.unh.edu
Mon May 7 14:19:20 CEST 2007

Hi I am reposting this with the code...

I have a problem re a table of equations. The table is something like
{|l|l|l|} with \hlines between each row. The | between columns aren't
connecting rows... the only go partially up from the lower \hline
leaving a break between their top and the upper \hline. Anyone ever
encounter this/ know how to fix?
here is the code

\documentclass{article}
\newcommand   {\fn}       [1]  { \hat{f}_{#1}  }
\newcommand   {\dd  }     [2]  { \frac{\partial #1}{ \partial #2 } }
\begin{document}
$\begin{array}{|l|l|l|} \hline \\ & {\mathbf \fn{i+1/2}} & {\mathbf \Delta x \dd{f(u)}{x} \approx } \\ \hline \\ \mbox{\bf \footnotesize \mathbf 1^{st} order} \footnotemark & f(u_{i+1}) & f_{i+1} - f_{i} \\ \hline \\ \mbox{\bf \footnotesize Lax-Wendroff} \footnotemark & \frac{1}{2}(f_{i+1}+f_i)-\frac{\lambda(a_{i+1/2})^2}{2}(u_{i+1}-u_i) & \frac{1}{2}(f_{i+1}-f_{i-1}) - \frac{\lambda a^2}{2}( u_{i-1} - 2u_i + u_{i+1} ) \\ \hline \\ \mbox{\bf \footnotesize Rusanov} \footnotemark & \frac{1}{2}(f_i + f_{i+1}) - \frac{1}{4}(\alpha_i + \alpha_{i+1})(u_{i+1}-u_{i}) & \frac{1}{2}(f_{i+1} - f_{i-1}) - \frac{\alpha}{2}( u_{i-1} - 2u_i + u_{i+1} )\\ \hline \\ \mbox{\bf \footnotesize Zalesak \mathbf 4^{th} order} & \frac{7}{12}(f_i + f_{i+1}) - \frac{1}{12}(f_{i-1} + f _{i+2}) & \frac{1}{12}(f_{i-2} - 8f_{i-1} - 8 f_{i+1} - f_{i+2} ) \\ \hline \end{array}$
\end{document}

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