%% %% Der Mathematiksatz mit LaTeX, 1. Auflage 2009 %% %% Example 6-2-12 on page 90. %% %% Copyright (C) 2009 Herbert Voss %% %% It may be distributed and/or modified under the conditions %% of the LaTeX Project Public License, either version 1.3 %% of this license or (at your option) any later version. %% %% See http://www.latex-project.org/lppl.txt for details. %% \documentclass[]{ttctexa} \pagestyle{empty} \setcounter{page}{6} \setlength\textwidth{355.65944pt} \AtBeginDocument{\setlength\parindent{0pt} \setcounter{section}{6}} \StartShownPreambleCommands \usepackage{amsmath} \usepackage[amsmath,thmmarks]{ntheorem} \theoremsymbol{\ensuremath{\triangle}} \theoremprework{\bigskip\hrule} \theorempostwork{\hrule\bigskip} \newtheorem{Beispiel}{Beispiel}[section] \StopShownPreambleCommands \begin{document} Normaler Text vor der neuen Umgebung. \begin{Beispiel} Anwendung des Transformationstheorems: \begin{align*} [z^n]C(z) &= [z^n]\biggl[\frac{e^{3/4}}{\sqrt{1-z}}+e^{-3/4}(1-z)^{1/2}+ \frac{e^{-3/4}}{4}(1-z)^{3/2}+O\Bigl((1-z)^{5/2}\Bigr)\biggr]\\[5pt] &= \frac{e^{-3/4}}{\sqrt{\pi n}}-\frac{5e^{-3/4}}{8\sqrt{\pi n^3}}+ \frac{e^{-3/4}}{128\sqrt{\pi n^5}}+O\biggl(\frac{1}{\sqrt{\pi n^7}}\biggr) \end{align*} \end{Beispiel} \end{document}