% book example for classicthesis.sty
\documentclass[11pt,a5paper,footinclude=true,headinclude=true]{scrbook} % KOMA-Script book
\usepackage[T1]{fontenc}
\usepackage{lipsum}
\usepackage[linedheaders,parts,pdfspacing]{classicthesis} % ,manychapters
%\usepackage[osf]{libertine}
\usepackage{amsthm}
\begin{document}
% \pagestyle{scrheadings}
% \manualmark
% \markboth{\spacedlowsmallcaps{\contentsname}}{\spacedlowsmallcaps{\contentsname}}
\tableofcontents
% \automark[section]{chapter}
% \renewcommand{\chaptermark}[1]{\markboth{\spacedlowsmallcaps{#1}}{\spacedlowsmallcaps{#1}}}
% \renewcommand{\sectionmark}[1]{\markright{\thesection\enspace\spacedlowsmallcaps{#1}}}
% use \cleardoublepage here to avoid problems with pdfbookmark
\cleardoublepage\part{Test Part}
\chapter{Some Math Testing}
\newtheoremstyle{note}% hnamei
{3pt}% hSpace abovei
{3pt}% hSpace belowi note
{}% hBody fonti
{}% hIndent amounti1
{\itshape}% hTheorem head fonti
% {\spacedlowsmallcaps}%
{:}% hPunctuation after theorem headi
{.5em}% hSpace after theorem headi2
{}%
\theoremstyle{note}
\newtheorem{note}{Definition}
\begin{note}
Here is a new definition
\end{note}
\begin{proof}
Here is my proof:
\[
a^2 + b^2 = c^2 \qedhere
\]
\end{proof}
\chapter{Test Chapter}
\lipsum[1]
\section{A Section}
\lipsum[1]
\chapter{Test Chapter}
\lipsum[1]
\section{A Section}
\lipsum[1]
% \include{multiToC}
\appendix
\cleardoublepage\part{Appendix}
\chapter{Appendix Chapter}
\lipsum[1]
\section{A Section}
\lipsum[1]
\end{document}