I was having some thought about what would be the syntax to make the end point evaluation of derivatives or integrals. Such as making the | with the two end points of evaluation on the top an bottom of the line. Any suggestions would be wonderful.
[Tex/LaTex] Evaluation of Differentiation and Integration
math-mode
Related Solutions
The cool package offers commands for writing partial derivates (and a lot of other stuff).
A short example:
\documentclass{article}
\usepackage{cool}
\begin{document}
\begin{equation*}
\pderiv{f}{x} \qquad
\pderiv[2,3]{f}{x,y} \qquad
\pderiv[1,n,4]{f}{x,y,z}
\end{equation*}
\end{document}
Note
By default the last two of those will not work, as there is a bug in the package. This can be fixed by changing a \def to \edef in line 2059 of cool.sty, see Basic use of derivative with cool package fails with "Missing \endcsname inserted"
The gauss package is specifically designed for this purpose and allows for typesetting even large matrices and the associated Gaussian elimination (or reduction).
Here is a fairly elementary example of Gaussian (or Gauss-Jordan) elimination on a 2x2 matrix:
\documentclass{article}
\usepackage{gauss,amsmath}
\begin{document}
\begin{align*}
& \begin{gmatrix}[p]
1 & 2 \\
3 & 4
\rowops
\add[-3]{0}{1}
\end{gmatrix} \\
\Rightarrow & \begin{gmatrix}[p]
1 & 2 \\
0 & -2
\rowops
\mult{1}{\scriptstyle\cdot-\frac{1}{2}}
\end{gmatrix} \\
\Rightarrow & \begin{gmatrix}[p]
1 & 2 \\
0 & 1
\rowops
\add[-2]{1}{0}
\end{gmatrix} \\
\Rightarrow & \begin{gmatrix}[p]
1 & 0 \\
0 & 1
\end{gmatrix}
\end{align*}
\end{document}
Matrices using the gauss package are typeset within a gmatrix environment (an optional parameter specifies the delimiters), while elementary row operations are specified using \mult, \add, or \swap. See the gauss documentation for more information and refinements.
amsmath provided the align* environment, although it was not necessary; a regular array would also have worked.
Best Answer
The
\big|or\Big|symbols work quite well