Merge pull request #2319 from devitocodes/halo_notebook

examples: Update MPI notebook to reference inner and outer halo terminology

examples/mpi/overview.ipynb

@@ -154,9 +154,7 @@
   {
    "cell_type": "code",
    "execution_count": 6,
-   "metadata": {
-    "scrolled": false
-   },
+   "metadata": {},
    "outputs": [
     {
      "name": "stdout",
@@ -628,7 +626,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "This is again a global data view. The shown *with_halo* is the \"true\" halo surrounding the physical domain, **not** the halo used for the MPI halo exchanges (often referred to as \"ghost region\"). So it gets trivial for a user to initialize the \"true\" halo region (which is typically read by a stencil `Eq` when an `Operator` iterates in proximity of the domain bounday).\n",
+    "This is again a global data view. The shown *with_halo* is the \"true\" halo surrounding the physical domain (often referred to as the \"outer halo\"), **not** the halo used for the MPI halo exchanges (often referred to as \"ghost region\" or \"inner halo\"). A user can straightforwardly initialize the \"true\" halo region (which is typically read by a stencil `Eq` when an `Operator` iterates in proximity of the domain bounday).\n",
     "\n",
     "Note: This \"halo\" is often encountered as \"ghost cell area\" in literature"
    ]
@@ -918,9 +916,9 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.8.10"
+   "version": "3.11.5"
   }
  },
  "nbformat": 4,
- "nbformat_minor": 2
+ "nbformat_minor": 4
 }