diff --git a/lineaire.tex b/Linéaire.tex
similarity index 99%
rename from lineaire.tex
rename to Linéaire.tex
index fea61a5..38b30a6 100644
--- a/lineaire.tex
+++ b/Linéaire.tex
@@ -3,16 +3,14 @@
 \input{common.tex}
 
 \begin{document}
-
 \thispagestyle{empty}
-\vspace*{\fill}
 \begin{center}
+\vspace*{\fill}
 \begin{tikzpicture}[x=1cm,y=1cm]
 
 \grid{18}{26}{gray}
 
 \end{tikzpicture}
-\end{center}
 \vspace*{\fill}
-
+\end{center}
 \end{document}
\ No newline at end of file
diff --git a/polaire.tex b/Polaire.tex
similarity index 92%
rename from polaire.tex
rename to Polaire.tex
index a6c35f6..c535105 100644
--- a/polaire.tex
+++ b/Polaire.tex
@@ -3,16 +3,14 @@
 \input{common.tex}
 
 \begin{document}
-
 \thispagestyle{empty}
-\vspace*{\fill}
 \begin{center}
+\vspace*{\fill}
 \begin{tikzpicture}[x=1cm,y=1cm]
 
 \polar{18}{26}{gray}
 
 \end{tikzpicture}
+\vspace*{\fill}
 \end{center}
-\vspace*{\fill} 
-
 \end{document}
\ No newline at end of file
diff --git a/semilog4.tex b/SemiLog4.tex
similarity index 99%
rename from semilog4.tex
rename to SemiLog4.tex
index a86e594..02c9eed 100644
--- a/semilog4.tex
+++ b/SemiLog4.tex
@@ -3,17 +3,15 @@
 \input{common.tex}
 
 \begin{document}
-
 \thispagestyle{empty}
-\vspace*{\fill}
 \begin{center}
+\vspace*{\fill}
 \begin{tikzpicture}[x=1cm,y=1cm]
 
 \vlin{18}{26}{9}{10}{gray}
 \hlog{18}{26}{4}{}{2,3,4,5}{}{6,7,8,9,10}{gray}
 
 \end{tikzpicture}
-\end{center}
 \vspace*{\fill}
-
+\end{center}
 \end{document}
\ No newline at end of file