diff --git a/PM3/python-functional-approximation-by-nn-and-rf.ipynb b/PM3/python-functional-approximation-by-nn-and-rf.ipynb
index bad75217..cf7dc699 100644
--- a/PM3/python-functional-approximation-by-nn-and-rf.ipynb
+++ b/PM3/python-functional-approximation-by-nn-and-rf.ipynb
@@ -31,7 +31,7 @@
     "tags": []
    },
    "source": [
-    "# Functional Approximations by Trees and Neural Networks\n",
+    "# Functional  Approximations by Trees and Neural Networks\n",
     "\n",
     "Here we show how the function\n",
     "$$\n",