diff --git a/.gitignore b/.gitignore
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+++ b/.gitignore
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+## Core latex/pdflatex auxiliary files:
+*.aux
+*.lof
+*.log
+*.lot
+*.fls
+*.out
+*.toc
+*.fmt
+*.fot
+*.cb
+*.cb2
+.*.lb
+
+## Intermediate documents:
+*.dvi
+*.xdv
+*-converted-to.*
+# these rules might exclude image files for figures etc.
+# *.ps
+# *.eps
+# *.pdf
+
+## Bibliography auxiliary files (bibtex/biblatex/biber):
+*.bbl
+*.bcf
+*.blg
+*-blx.aux
+*-blx.bib
+*.run.xml
+
+## Build tool auxiliary files:
+*.fdb_latexmk
+*.synctex
+*.synctex(busy)
+*.synctex.gz
+*.synctex.gz(busy)
+*.pdfsync
+
+## Build tool directories for auxiliary files
+# latexrun
+latex.out/
+
+## Auxiliary and intermediate files from other packages:
+# algorithms
+*.alg
+*.loa
+
+# achemso
+acs-*.bib
+
+# amsthm
+*.thm
+
+# beamer
+*.nav
+*.pre
+*.snm
+*.vrb
+
+# changes
+*.soc
+
+# comment
+*.cut
+
+# cprotect
+*.cpt
+
+# elsarticle (documentclass of Elsevier journals)
+*.spl
+
+# endnotes
+*.ent
+
+# fixme
+*.lox
+
+# feynmf/feynmp
+*.mf
+*.mp
+*.t[1-9]
+*.t[1-9][0-9]
+*.tfm
+
+#(r)(e)ledmac/(r)(e)ledpar
+*.end
+*.?end
+*.[1-9]
+*.[1-9][0-9]
+*.[1-9][0-9][0-9]
+*.[1-9]R
+*.[1-9][0-9]R
+*.[1-9][0-9][0-9]R
+*.eledsec[1-9]
+*.eledsec[1-9]R
+*.eledsec[1-9][0-9]
+*.eledsec[1-9][0-9]R
+*.eledsec[1-9][0-9][0-9]
+*.eledsec[1-9][0-9][0-9]R
+
+# glossaries
+*.acn
+*.acr
+*.glg
+*.glo
+*.gls
+*.glsdefs
+*.lzo
+*.lzs
+
+# uncomment this for glossaries-extra (will ignore makeindex's style files!)
+# *.ist
+
+# gnuplottex
+*-gnuplottex-*
+
+# gregoriotex
+*.gaux
+*.gtex
+
+# htlatex
+*.4ct
+*.4tc
+*.idv
+*.lg
+*.trc
+*.xref
+
+# hyperref
+*.brf
+
+# knitr
+*-concordance.tex
+# TODO Uncomment the next line if you use knitr and want to ignore its generated tikz files
+# *.tikz
+*-tikzDictionary
+
+# listings
+*.lol
+
+# luatexja-ruby
+*.ltjruby
+
+# makeidx
+*.idx
+*.ilg
+*.ind
+
+# minitoc
+*.maf
+*.mlf
+*.mlt
+*.mtc[0-9]*
+*.slf[0-9]*
+*.slt[0-9]*
+*.stc[0-9]*
+
+# minted
+_minted*
+*.pyg
+
+# morewrites
+*.mw
+
+# nomencl
+*.nlg
+*.nlo
+*.nls
+
+# pax
+*.pax
+
+# pdfpcnotes
+*.pdfpc
+
+# sagetex
+*.sagetex.sage
+*.sagetex.py
+*.sagetex.scmd
+
+# scrwfile
+*.wrt
+
+# sympy
+*.sout
+*.sympy
+sympy-plots-for-*.tex/
+
+# pdfcomment
+*.upa
+*.upb
+
+# pythontex
+*.pytxcode
+pythontex-files-*/
+
+# tcolorbox
+*.listing
+
+# thmtools
+*.loe
+
+# TikZ & PGF
+*.dpth
+*.md5
+*.auxlock
+
+# todonotes
+*.tdo
+
+# vhistory
+*.hst
+*.ver
+
+# easy-todo
+*.lod
+
+# xcolor
+*.xcp
+
+# xmpincl
+*.xmpi
+
+# xindy
+*.xdy
+
+# xypic precompiled matrices and outlines
+*.xyc
+*.xyd
+
+# endfloat
+*.ttt
+*.fff
+
+# Latexian
+TSWLatexianTemp*
+
+## Editors:
+# WinEdt
+*.bak
+*.sav
+
+# Texpad
+.texpadtmp
+
+# LyX
+*.lyx~
+
+# Kile
+*.backup
+
+# gummi
+.*.swp
+
+# KBibTeX
+*~[0-9]*
+
+# TeXnicCenter
+*.tps
+
+# auto folder when using emacs and auctex
+./auto/*
+*.el
+
+# expex forward references with \gathertags
+*-tags.tex
+
+# standalone packages
+*.sta
+
+# Makeindex log files
+*.lpz
+
+# xwatermark package
+*.xwm
+
+# REVTeX puts footnotes in the bibliography by default, unless the nofootinbib
+# option is specified. Footnotes are the stored in a file with suffix Notes.bib.
+# Uncomment the next line to have this generated file ignored.
+#*Notes.bib
+
diff --git a/01/navid_sassan_praktikum1.pdf b/01/navid_sassan_praktikum1.pdf
new file mode 100644
index 0000000..41d1b41
Binary files /dev/null and b/01/navid_sassan_praktikum1.pdf differ
diff --git a/01/navid_sassan_praktikum1.tex b/01/navid_sassan_praktikum1.tex
new file mode 100644
index 0000000..8c40806
--- /dev/null
+++ b/01/navid_sassan_praktikum1.tex
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+\documentclass{article}
+\usepackage{graphicx}
+\usepackage{listings}
+\usepackage{color}
+\usepackage{fancyhdr}
+\pagestyle{fancy}
+\lhead{Navid Sassan, sassanav, 17-740-812}
+\chead{}
+\rhead{}
+\lfoot{}
+\rfoot{}
+\cfoot{\thepage}
+
+\usepackage{listings}
+\usepackage{color}
+\usepackage{tikz}
+\usepackage{qtree}
+\usepackage{amssymb}
+
+\def\ojoin{\setbox0=\hbox{$\bowtie$}%
+  \rule[-.02ex]{.25em}{.4pt}\llap{\rule[\ht0]{.25em}{.4pt}}}
+\def\leftouterjoin{\mathbin{\ojoin\mkern-5.8mu\bowtie}}
+\def\rightouterjoin{\mathbin{\bowtie\mkern-5.8mu\ojoin}}
+\def\fullouterjoin{\mathbin{\ojoin\mkern-5.8mu\bowtie\mkern-5.8mu\ojoin}}
+
+\usetikzlibrary{automata, positioning, arrows}
+\tikzset{
+    ->, % makes the edges directed
+    >=stealth', % makes the arrow heads bold
+    node distance=3cm, % specifies the minimum distance between two nodes. Change if necessary.
+    every state/.style={thick, fill=gray!10}, % sets the properties for each ’state’ node
+    initial text=$ $, % sets the text that appears on the start arrow
+}
+
+\definecolor{mygreen}{rgb}{0,0.6,0}
+\definecolor{mygray}{rgb}{0.5,0.5,0.5}
+\definecolor{mymauve}{rgb}{0.58,0,0.82}
+
+\lstset{ %
+	backgroundcolor=\color{white},   % choose the background color; you must add \usepackage{color} or \usepackage{xcolor}; should come as last argument
+	basicstyle=\footnotesize,        % the size of the fonts that are used for the code
+	breakatwhitespace=false,         % sets if automatic breaks should only happen at whitespace
+	breaklines=true,                 % sets automatic line breaking
+	captionpos=b,                    % sets the caption-position to bottom
+	commentstyle=\color{mygreen},    % comment style
+	deletekeywords={...},            % if you want to delete keywords from the given language
+	escapeinside={\%*}{*)},          % if you want to add LaTeX within your code
+	extendedchars=true,              % lets you use non-ASCII characters; for 8-bits encodings only, does not work with UTF-8
+	frame=single,	                   % adds a frame around the code
+	keepspaces=true,                 % keeps spaces in text, useful for keeping indentation of code (possibly needs columns=flexible)
+	keywordstyle=\color{blue},       % keyword style
+	language=Octave,                 % the language of the code
+	morekeywords={*,...},            % if you want to add more keywords to the set
+	numbers=left,                    % where to put the line-numbers; possible values are (none, left, right)
+	numbersep=5pt,                   % how far the line-numbers are from the code
+	numberstyle=\tiny\color{mygray}, % the style that is used for the line-numbers
+	rulecolor=\color{black},         % if not set, the frame-color may be changed on line-breaks within not-black text (e.g. comments (green here))
+	showspaces=false,                % show spaces everywhere adding particular underscores; it overrides 'showstringspaces'
+	showstringspaces=false,          % underline spaces within strings only
+	showtabs=false,                  % show tabs within strings adding particular underscores
+	stepnumber=1,                    % the step between two line-numbers. If it's 1, each line will be numbered
+	stringstyle=\color{mymauve},     % string literal style
+	tabsize=2,	                   % sets default tabsize to 2 spaces
+	title=\lstname                   % show the filename of files included with \lstinputlisting; also try caption instead of title
+}
+
+\begin{document}
+
+\section{Aufgabe 1}
+
+\subsection{1}
+\begin{tabular}{ |c|c| }
+    \hline
+    B & C \\
+    \hline
+    0 & 1 \\
+    \hline
+\end{tabular}
+
+\subsection{2}
+\begin{tabular}{ |c|c|c| }
+    \hline
+    D & B & C \\
+    \hline
+    1 & 0 & 1 \\
+    0 & 0 & 1 \\
+    \hline
+\end{tabular}
+
+
+\section{Aufgabe 2}
+
+\subsection{1}
+$\Pi_{Kaffehaeuser}(\sigma_{s.Kuchen \neq v.Kuchen}((g \bowtie s) \bowtie v))$
+
+\subsection{2}
+$\Pi_{Besucher}(\sigma_{Kuchen = NULL}(\sigma_{(Kaffehaus = 'Spruengli' or Kaffehaus = 'Cafe Sacher')}(g)\leftouterjoin v)$
+
+
+\section{Aufgabe 3}
+
+\subsection{1}
+\begin{tabular}{ |c|c| }
+    \hline
+    C & D \\
+    \hline
+    3 & 0 \\
+    \hline
+    4 & 0 \\
+    \hline
+\end{tabular}
+
+\subsection{2}
+\begin{tabular}{ |c|c|c|c| }
+    \hline
+    D & B & C & A \\
+    \hline
+    0 & 1 & 3 & 0 \\
+    \hline
+    0 & 1 & 3 & 7 \\
+    \hline
+\end{tabular}
+
+
+
+\end{document}