diff --git a/formelsammlung.tex b/formelsammlung.tex
index e69de29..03b751a 100644
--- a/formelsammlung.tex
+++ b/formelsammlung.tex
@@ -0,0 +1,5 @@
+\chapter{Lineare Algebra}
+\section{Identitäten}
+\begin{math}
+A^{-1} = \inlinematrix{a & b \\ c & d}^{-1} = \frac{1}{ad - bc} \inlinematrix{d & -b \\ -c & a}
+\end{math}
diff --git a/math.tex b/math.tex
index 02b70db..6af9b38 100644
--- a/math.tex
+++ b/math.tex
@@ -33,3 +33,5 @@
 
 \newcommand{\sum}[3]{\Sigma_{#1}^{#2} #3}
 \newcommand{\prod}[3]{\Pi_{#1}^{#2} #3}
+
+\newcommand{\bbracket}[1]{\left #1 \right}
diff --git a/theo2.kilepr b/theo2.kilepr
index ddadb96..e994582 100644
--- a/theo2.kilepr
+++ b/theo2.kilepr
@@ -3,7 +3,7 @@ img_extIsRegExp=false
 img_extensions=.eps .jpg .jpeg .png .pdf .ps .fig .gif
 kileprversion=2
 kileversion=2.0
-lastDocument=kapII-0.tex
+lastDocument=ueb7.tex
 masterDocument=
 name=Theo2
 pkg_extIsRegExp=false
@@ -15,6 +15,15 @@ src_extensions=.tex .ltx .latex .dtx .ins
 MakeIndex=
 QuickBuild=PDFLaTeX+ViewPDF
 
+[item:formelsammlung.tex]
+archive=true
+column=95
+encoding=ISO 8859-1
+highlight=LaTeX
+line=3
+open=true
+order=2
+
 [item:kapI-1.tex]
 archive=true
 column=10936
@@ -71,11 +80,11 @@ order=-1
 
 [item:kapII-0.tex]
 archive=true
-column=98
+column=0
 encoding=UTF-8
 highlight=LaTeX
-line=46
-open=true
+line=0
+open=false
 order=1
 
 [item:kapII-1.tex]
@@ -107,21 +116,21 @@ order=-1
 
 [item:math.tex]
 archive=true
-column=42
-encoding=UTF-8
+column=0
+encoding=ISO 8859-1
 highlight=LaTeX
-line=29
-open=false
+line=37
+open=true
 order=3
 
 [item:physics.tex]
 archive=true
-column=22
-encoding=
+column=37
+encoding=ISO 8859-1
 highlight=LaTeX
-line=1
-open=false
-order=-1
+line=10
+open=true
+order=4
 
 [item:theo2.kilepr]
 archive=true
@@ -134,10 +143,10 @@ order=-1
 
 [item:theo2.tex]
 archive=true
-column=0
-encoding=UTF-8
+column=25
+encoding=ISO 8859-1
 highlight=LaTeX
-line=46
+line=51
 open=true
 order=0
 
@@ -181,7 +190,7 @@ order=-1
 archive=true
 column=0
 encoding=
-highlight=
+highlight=LaTeX
 line=0
 open=false
 order=-1
@@ -189,8 +198,17 @@ order=-1
 [item:ueb6.tex]
 archive=true
 column=0
-encoding=
-highlight=
-line=0
+encoding=UTF-8
+highlight=LaTeX
+line=119
 open=false
 order=-1
+
+[item:ueb7.tex]
+archive=true
+column=15
+encoding=ISO 8859-1
+highlight=LaTeX
+line=67
+open=true
+order=1
diff --git a/theo2.tex b/theo2.tex
index b83b70d..1482e64 100644
--- a/theo2.tex
+++ b/theo2.tex
@@ -47,5 +47,9 @@
 % \include{ueb6}
 % \inlcude{ueb7}
 
+% \part{Formelsammlung}
+% \label{FS}
+% \include{formelsammlung}
+
 
 \end{document}