GammaSimple 2003-08-18 14:26:37 2007-06-24 16:13:48 Definition % this is the default PlanetMath preamble. as your knowledge % of TeX increases, you will probably want to edit this, but % it should be fine as is for beginners. % almost certainly you want these \usepackage{amssymb} \usepackage{amsmath} \usepackage{amsfonts} % used for TeXing text within eps files %\usepackage{psfrag} % need this for including graphics (\includegraphics) %\usepackage{graphicx} % for neatly defining theorems and propositions %\usepackage{amsthm} % making logically defined graphics %\usepackage{xypic} % there are many more packages, add them here as you need them % define commands here A representation $V$ of $\Gamma$ is \emph{$\Gamma$-simple} if either \begin{itemize} \item $V \cong W_1 \oplus W_2$ where $W_1$, $W_2$ are absolutely irreducible for $\Gamma$ and are $\Gamma$-isomorphic, or \item $V$ is non-absolutely irreducible for $\Gamma$. \end{itemize} \cite{1} \begin{thebibliography}{1} \bibitem[GSS]{1} Golubitsky, Martin. Stewart, Ian. Schaeffer, G. David.: Singularities and Groups in Bifurcation Theory \textit{(Volume II)}. Springer-Verlag, New York, 1988. \end{thebibliography}