add more explanations and remarks

tutorial-1/solution01-2.ipynb

@@ -100,6 +100,17 @@
     "## Functions"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {
+    "slideshow": {
+     "slide_type": "slide"
+    }
+   },
+   "source": [
+    "> **Remark:** The `lambda` operator is a way to create small anonymous functions, i.e. functions without a name, in Python. "
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 5,

tutorial-1/tutorial01-2.ipynb

@@ -72,6 +72,13 @@
     "## Functions"
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "> **Remark:** The `lambda` operator is a way to create small anonymous functions, i.e. functions without a name, in Python. "
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 4,