diff --git a/notebooks/week-0.ipynb b/notebooks/week-0.ipynb
deleted file mode 100644
index dd1be41..0000000
--- a/notebooks/week-0.ipynb
+++ /dev/null
@@ -1,67 +0,0 @@
-{
- "cells": [
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "# Woche 0 - 10.-16. Oktober 2022 #\n",
-    "\n",
-    "Herzlich willkommen zur 0. Woche!"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "import os;\n",
-    "import sys;\n",
-    "\n",
-    "# NOTE: need this to force jupyter to reload imports:\n",
-    "for key in list(sys.modules.keys()):\n",
-    "    if key.startswith('src.'):\n",
-    "        del sys.modules[key];\n",
-    "\n",
-    "os.chdir(os.path.dirname(_dh[0]));\n",
-    "sys.path.insert(0, os.getcwd());\n",
-    "\n",
-    "from src.thirdparty.maths import *;\n",
-    "from src.thirdparty.render import *;\n",
-    "\n",
-    "np.random.seed(8007253); # zur Wiederholbarkeit"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "A = np.random.randint(-100, 100, size=(4, 7));\n",
-    "display(array_to_latex(A, precision=3));"
-   ]
-  }
- ],
- "metadata": {
-  "kernelspec": {
-   "display_name": "Python 3.10.6 64-bit",
-   "language": "python",
-   "name": "python3"
-  },
-  "language_info": {
-   "codemirror_mode": {
-    "name": "ipython",
-    "version": 3
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.10.6"
-  }
- },
- "nbformat": 4,
- "nbformat_minor": 2
-}
diff --git a/notebooks/week-2.ipynb b/notebooks/week-2.ipynb
new file mode 100644
index 0000000..2309790
--- /dev/null
+++ b/notebooks/week-2.ipynb
@@ -0,0 +1,100 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# Woche 2 - 17.-23. Oktober 2022 #\n",
+    "\n",
+    "Herzlich willkommen zur 2. Woche!"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import os;\n",
+    "import sys;\n",
+    "\n",
+    "# NOTE: need this to force jupyter to reload imports:\n",
+    "for key in list(sys.modules.keys()):\n",
+    "    if key.startswith('src.'):\n",
+    "        del sys.modules[key];\n",
+    "\n",
+    "os.chdir(os.path.dirname(_dh[0]));\n",
+    "sys.path.insert(0, os.getcwd());\n",
+    "\n",
+    "from src.thirdparty.maths import *;\n",
+    "from src.thirdparty.render import *;\n",
+    "\n",
+    "from src.maths.diagrams import *;\n",
+    "from src.maths.sets import *;\n",
+    "\n",
+    "np.random.seed(8007253); # zur Wiederholbarkeit"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "A = np.random.randint(-100, 100, size=(4, 7));\n",
+    "\n",
+    "X = ['a', 'b', 'c', 'd', 'e'];\n",
+    "Y = [2, 3, 5, 7, 11, 13, 17];\n",
+    "Z = ['α', 'β', 'γ', 'δ'];\n",
+    "f = [('a', 5), ('b', 5), ('c', 17), ('d', 2)]\n",
+    "g = [(2, 'γ'), (3, 'α'), (5, 'β'), (7, 'δ'), (11, 'β'), (13, 'γ'), (17, 'β')];\n",
+    "comp = Functions(\n",
+    "    Function(name=('$f$', 'X', 'Y'), domain=X, codomain=Y, fct=f),\n",
+    "    Function(name=('$g$', 'Y', 'Z'), domain=Y, codomain=Z, fct=g),\n",
+    ");\n",
+    "comp.draw(show_labels=True);"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "A = np.random.randint(-100, 100, size=(4, 7));\n",
+    "\n",
+    "X = randomset_alphabet(low=2, high=5);\n",
+    "Y = randomset_integers(low=2, high=5);\n",
+    "Z = randomset_greek(low=2, high=5);\n",
+    "f = random_function(X, Y);\n",
+    "g = random_function(Y, Z);\n",
+    "comp = Functions(\n",
+    "    Function(name=('$f$', 'X', 'Y'), domain=X, codomain=Y, fct=f),\n",
+    "    Function(name=('$g$', 'Y', 'Z'), domain=Y, codomain=Z, fct=g),\n",
+    ");\n",
+    "comp.draw(show_labels=False);"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3.10.8 64-bit",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.10.8"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}