Check mean difference instead to sum

V_verify.ipynb

@@ -57,7 +57,7 @@
     "V_julia = np.frombuffer(buffer, dtype=np.float32)\n",
     "\n",
     "abs_diff = np.abs(V_local-V_julia)\n",
-    "s = np.sum(abs_diff)\n",
+    "s = np.mean(abs_diff)\n",
     "print(s)"
    ]
   }