\makeatletter
\DeclareMathSizes{\@xipt}{10}{7}{5} % For size 11pt text
\makeatother
The second argument = Math text size (in pt), 3rd = script size,
4th = scriptscript size
\usepackage{pmat}
\begin{document}
\[
\begin{pmat}[{.|}]
a_{11} & a_{12} & b_{11} \cr
a_{21} & a_{22} & b_{21} \cr\-
c_{11} & c_{12} & d_{11} \cr
\end{pmat}
\]
\end{document}
Large fraction
Use dfrac{}{} in amsmath package to create a large fraction font
Phasor operator
Use package steinmetz and define the new command
\newcommand{\jphase}[1]{\phase{#1l}}
and modify steinmetz.sty by changing the linethickness to .3pt
\put(0,0){\line(1,0){\ph@x}}\put(0,0){\line(1,2.5){\ph@dx}}
Right-aligned matrix
\setcounter{}{20} % Increase max columns from 10 to 20
\makeatletter
\renewcommand*\env@matrix[1][c]{\hskip -\arraycolsep
\let\@ifnextchar\new@ifnextchar
\array{*\c@MaxMatrixCols #1}}
\makeatother
and use
\begin{bmatrix}[r]
\end{bmatrix}
or
%% Change the matrix alignment to the right
\makeatletter
\def\env@matrix{\hskip -\arraycolsep
\let\@ifnextchar\new@ifnextchar
\array{*\c@MaxMatrixCols r}}
\makeatother
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%% Increase # columns from the default 10 to 20.
%% Make the bmatrix right-aligned with \begin{bmatrix}[r]
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\setcounter{MaxMatrixCols}{20}
\makeatletter
\renewcommand*\env@matrix[1][c]{\hskip -\arraycolsep
\let\@ifnextchar\new@ifnextchar
\array{*\c@MaxMatrixCols #1}}
\makeatother
