--- a/notes/tex/preamble.tex	Mon Jul 08 23:41:52 2013 +0200
+++ b/notes/tex/preamble.tex	Mon Jul 08 23:41:59 2013 +0200
@@ -35,7 +35,10 @@
 \tikzstyle{automaton} = [shorten >=1pt, node distance = 3cm, auto, bend angle=20, initial text=]
 \tikzstyle{small} = [every node/.style={scale=0.5}, baseline=(current bounding box.north), font=\LARGE]
 
-\tikzstyle{tape} = [on chain, draw, rectangle, minimum size = 6mm, fill=tumblue!10]
+\tikzstyle{rectangular} = [draw, rectangle, minimum size = 6mm, fill=tumblue!10]
+\tikzstyle{tape} = [on chain, rectangular]
 \tikzstyle{active} = [fill=tumred!10]
 \tikzstyle{head} = [arrow box, draw, minimum size=5mm, arrow box arrows={east:.25cm, west:0.25cm, north:0.2cm}, fill=tumred!10]
 \tikzstyle{machine} = [rectangle, draw, minimum width=2cm, minimum height=1cm, inner sep=3mm, fill=tumgreen!10]
+
+\newcommand{\pcp}[2]{ \begin{tabu}{c} #1 \\ \tabucline{-} #2 \\ \end{tabu} }