fix

test_projection.ipynb

@@ -876,6 +876,37 @@
     "\n"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "id": "78eb2e53",
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "array([1.41421356, 5.        ])"
+      ]
+     },
+     "execution_count": 2,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "import numpy as np\n",
+    "a = np.array([[1, 1], [3, 4]])\n",
+    "np.hypot(a[:, 0], a[:, 1])"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "6f726e54",
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  },
   {
    "cell_type": "code",
    "execution_count": null,