diff --git a/washington_letterhead_letter-matrix-deptartment.tex b/washington_letterhead_letter-matrix-deptartment.tex
index 3f6a2a6..96b9a7f 100644
--- a/washington_letterhead_letter-matrix-deptartment.tex
+++ b/washington_letterhead_letter-matrix-deptartment.tex
@@ -101,35 +101,6 @@ BoldItalicFont  =   *-BdIt
 % \raggedright
 \linespread{1.05}
 
-\newtheorem{theorem}{Theorem}[section]
-\newtheorem{definition}{Definition}[section]
-\newenvironment{demo}{\noindent {\bf Dem.}}{\qed}
-\newenvironment{remarque}{\noindent {\bf Rem.} \small \itshape}{}
-\newenvironment{exemple}{\noindent {\bf Example}}{}
-
-\newcommand{\Lu}{L^1(\Rset)}
-\newcommand{\tf}[1]{{\cal F}\left(#1\right)}
-\newcommand{\ii}{{\mathrm{i}}}
-\newcommand{\Cn}{{\cal C}^{n}}
-\newcommand{\dd}{\mathrm{d}}
-% ;; \newcommand{\Rset}{{\mathbb R}}
-\newcommand{\Rset}{R}
-\newcommand{\R}{\mathbb R}
-\newcommand{\Cx}{\mathbb R}
-\newcommand{\ex}{\mathrm{e}}
-\newcommand{\Cinf}{{\cal C}^{\infty}}
-\newcommand{\abs}[1]{\left| #1 \right|}
-\newcommand{\dx}{\dd x}
-\newcommand{\ds}{\displaystyle}
-\newcommand{\vect}[1]{\overrightarrow{#1}}
-\newcommand{\Boule}[2]{\mathscr B(#1,#2)}
-\newcommand{\Cercle}[2]{\mathscr C(#1,#2)}
-\DeclareMathOperator{\Arg}{Arg}
-
-\newcommand{\dep}[2]{\ds \frac{\partial #1}{\partial #2}}
-
-% \usepackage[cal=scr,mdpgd,greekfamily = didot]{mathdesign}
-
 \begin{document}
 
 % these two sections turn off the aggressively long alternate q