Add files via upload

Author: norvig

ipynb/How To Count Things.ipynb

@@ -1026,8 +1026,8 @@
    "source": [
     "So we can say the complete set of valid number of coconuts for a given number of pirates *p* is:\n",
     "    \n",
-    "- $(p - 1) × (p^p - 1) + k × p^{p+1}$ when $p$ is even, for any nonnegative integer $k$\n",
-    "- $p^p - p + 1  + k × p^{p+1}$ when $p$ is odd, for any nonnegative integer $k$"
+    "- $(p - 1) \\times (p^p - 1) + k \\times p^{p+1}$ when $p$ is even, for any nonnegative integer $k$\n",
+    "- $p^p - p + 1  + k \\times p^{p+1}$ when $p$ is odd, for any nonnegative integer $k$"
    ]
   },
   {