\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{amsmath}
+\usepackage{amssymb}
\usepackage{ae}
\usepackage{aecompl}
\usepackage[dvips]{graphicx}
\mainmatter{}
\include{intro}
+\include{math}
\include{mech}
\include{qm}
\include{stat}
\appendix{}
\part{Appendices}
-\include{math}
+\include{math_app}
\backmatter{}
\include{literature}