Updated diffusion and functino notebooks

Author: smmorey

lessons/python/hillslope_diffusion.ipynb

@@ -43,7 +43,7 @@
     "\n",
     "When you combine these together, here's what you get:\n",
     "\n",
-    "$$\\frac{\\partial z}{\\partial t} = K_c \\frac{\\partial^2 z}{\\partial x^2}$$\n",
+    "$$\\boxed{\\frac{\\partial z}{\\partial t} = K_c \\frac{\\partial^2 z}{\\partial x^2}}$$\n",
     "\n",
     "This has exactly the form of a 1D diffusion equation!\n",
     "We will revisit this and built more code from skratch for it in a later lecture.\n",
@@ -58,7 +58,11 @@
    },
    "cell_type": "markdown",
    "id": "d5416bd3-1024-4a31-90d2-b149f257263e",
-   "metadata": {},
+   "metadata": {
+    "jupyter": {
+     "source_hidden": true
+    }
+   },
    "source": [
     "### Simulating hillslope evolution by soil creep\n",
     "Suppose we want to model the formation of a ridge between two streams. Each stream is cutting down at a given rate. Our domain consists of a cross-sectional profile from one stream to the other.\n",

lessons/python/hillslope_functions.ipynb

@@ -30,7 +30,7 @@
    "metadata": {},
    "source": [
     "\n",
-    "In the [diffusion](diffusion.ipynb) notebook,\n",
+    "In Python For Modeling II notebook,\n",
     "we wrote code\n",
     "to solve the one-dimensional diffusion equation numerically,\n",
     "evolve the solution with time,\n",