diff --git a/DeepLearning-Notations.ipynb b/DeepLearning-Notations.ipynb
index 5fad825..b5f26fd 100644
--- a/DeepLearning-Notations.ipynb
+++ b/DeepLearning-Notations.ipynb
@@ -400,7 +400,7 @@
     "$\\left[ a, b\\right]$ - the real interval including $a$ and $b$  \n",
     "Latex:  `$\\left[ a, b\\right]$`\n",
     "\n",
-    "$(a,b ]$ - the real interval excluding $a$ but not including $b$  \n",
+    "$(a,b ]$ - the real interval excluding $a$ but including $b$  \n",
     "Latex: `$(a,b ]$`\n",
     "\n",
     "$\\mathbb{A} \\backslash \\mathbb{B}$ - set substraction, i.e., the set containing the elements of $\\mathbb{A}$ that are not in $\\mathbb{B}$  \n",