diff --git a/notes/Least-Square Fitting.ipynb b/notes/Least-Square Fitting.ipynb
index a181f48..a100ea4 100644
--- a/notes/Least-Square Fitting.ipynb	
+++ b/notes/Least-Square Fitting.ipynb	
@@ -919,7 +919,7 @@
     "p(a) = x_1 + x_2 a + x_3 a^2 + \\cdots + x_n a^{n-1} \\; ,\n",
     "$$\n",
     "\n",
-    "which leads to the $m \\times n$ matrix\n",
+    "which leads to the $m \\times n$ matrix (called a [\"Vandermonde\" matrix](https://en.wikipedia.org/wiki/Vandermonde_matrix))\n",
     "\n",
     "$$\n",
     "A = \\begin{pmatrix}\n",