\documentclass[14pt]{beamer}

% beamer definieert 'definition' al, maar dan engels :(
% fix van:
% http://tex.stackexchange.com/questions/38392/how-to-rename-theorem-or-lemma-in-beamer-to-another-language
\usepackage[dutch]{babel}
\uselanguage{dutch}
\languagepath{dutch}
\deftranslation[to=dutch]{Definition}{Definitie}

\newcommand{\spc}[0]{\hspace{0.5cm}}

\input{../thesis/preamble}

\begin{document}


\begin{frame}
	% Symbols used in drawings
	Bekijk $\Delta^n \tot{f} X$, dwz...

	\Large $\cdots \tot{\del_2} \{\} \tot{\del_1} \{\} \tot{\del_0} \{\}$

	$ \sigma_1 + \sigma_2 + \sigma_3 = \del(\tau) $

	$ \mapsto $

	$ X \subseteq \mathbb{R}^2 $
\end{frame}

\begin{frame}
	% Symbols used in drawings
	\large $\cdots \tot{\spc{}\del_2\spc{}} C_2 \tot{\spc{}\del_1\spc{}} C_1 \tot{\spc{}\del_0\spc{}} C_0$

	\large \reflectbox{\rotatebox[origin=c]{90}{\large $=$}}

	\tiny $$ + - \mapsto $$
\end{frame}

\end{document}