Merge pull request #1 from w29593617/main

Fixed a formula mistake.

Author: AntonioLonga

Tutorial4/Tutorial4.ipynb

@@ -263,7 +263,7 @@
     "U = \n",
     "\\begin{bmatrix}\n",
     "u_0(0) & u_1(0) & \\dots & u_{N-1}(0)\\\\\n",
-    "u_0(1) & u_1(0) & \\dots & u_{N-1}(1)\\\\\n",
+    "u_0(1) & u_1(1) & \\dots & u_{N-1}(1)\\\\\n",
     "\\vdots & \\vdots& & \\vdots\\\\\n",
     "u_0(N-1) & u_1(N-1) & \\dots & u_{N-1}(N-1)\\\\\n",
     "\\end{bmatrix} \n",
@@ -747,4 +747,4 @@
  },
  "nbformat": 4,
  "nbformat_minor": 4
-}
+}