diff --git a/latex/inputTD.sty b/latex/inputTD.sty
index 81ba772..98bf4aa 100644
--- a/latex/inputTD.sty
+++ b/latex/inputTD.sty
@@ -18,7 +18,6 @@
 \newtheorem*{important}{Important}
 \newtheorem*{rappel}{Rappel}
 
-\RequirePackage{xfrac}
 \RequirePackage{xparse}
 \RequirePackage{comment}
 \RequirePackage{xr}
@@ -118,8 +117,5 @@
 \fi
 }
 
-\DeclareInstance{xfrac}{cinqdemi}{text}{scale-factor=1, h-scale=1.25, slash-left-kern=-2.5pt, slash-right-kern=-2.25pt}
-
-\def\cinqdemi{\sfrac[cinqdemi]{5}{2}}
 
 \endinput
\ No newline at end of file
diff --git a/latex/yssymbols.sty b/latex/yssymbols.sty
index bfe9d82..5382109 100644
--- a/latex/yssymbols.sty
+++ b/latex/yssymbols.sty
@@ -74,4 +74,13 @@
 \let\ensquot\faktor
 
 \def\ssi{\@ifnextchar i{si et seulement s'}{si et seulement si\xspace}}
+
+\RequirePackage{relsize}
+\DeclareRobustCommand\mention[1]{\texorpdfstring{\tikz[baseline=(char.base)]{
+        \node[shape=rectangle, rounded corners,draw,inner sep=2pt] (char) {\textsmaller{#1}};}}{(#1)}}
+\def\cinqdemi{\mention{5/2}}
+\def\horsprog{\mention{HP}}
+\def\newprog{\mention{P2021}}
+\def\progmpi{\mention{MPI}}
+
 \endinput
\ No newline at end of file