diff --git a/Rapport.ipynb b/Rapport.ipynb
index 14626d37488ebc9703860e483b7d4f0ef226ebc6..876c42d4e155ee8f11afe0b62b3a6664bf07b7d4 100644
--- a/Rapport.ipynb
+++ b/Rapport.ipynb
@@ -473,13 +473,13 @@
     "\n",
     "### 1\n",
     "\n",
-    "$\n",
+    "$`\n",
     "\\sigma(x)=\\frac{1}{1+e^{-x}}\\\\\n",
     "\\Rightarrow \\sigma'(x)=\\frac{-e^{-x}}{-(1+e^{-x})^2}\\\\\n",
     "\\Rightarrow \\sigma'(x)=\\frac{1}{1+e^{-x}}(\\frac{1+e^{-x}-1}{1+e^{-x}})\\\\\n",
     "\\Rightarrow \\sigma'(x)=\\sigma(\\frac{1+e^{-x}}{1+e^{-x}}-\\frac{1}{1+e^{-x}})\\\\\n",
     "\\Rightarrow \\sigma'(x)=\\sigma(1-\\sigma)\n",
-    "$\n",
+    "`$\n",
     "\n",
     "### 2\n",
     "\n",