fixed fourier convention index of norm

docs/demos/getting_started.ipynb

@@ -83,7 +83,7 @@
     "\n",
     "\\begin{align}\n",
     "    \\mathcal{F}_k &= \\int \\mathcal{F}_x e^{-i\\vec{k}\\cdot\\vec{x}} d^n\\vec{x} \\\\\n",
-    "    \\mathcal{F}_x &= (2\\pi)^{-n} \\int \\mathcal{F}_ke^{i\\vec{k}\\cdot\\vec{x}} d^n\\vec{k}. \\\\\n",
+    "    \\mathcal{F}_x &= (2\\pi)^{-n/2} \\int \\mathcal{F}_ke^{i\\vec{k}\\cdot\\vec{x}} d^n\\vec{k}. \\\\\n",
     "\\end{align}"
    ]
   },