precise what phi means in appendix

alexgarel · alexgarel · commit 86e393226fe4 · 2013-05-14T00:48:54.000+02:00
diff --git a/Chapter4_TheGreatestTheoremNeverTold/LawOfLargeNumbers.ipynb b/Chapter4_TheGreatestTheoremNeverTold/LawOfLargeNumbers.ipynb
@@ -991,6 +991,8 @@
       "\n",
       "$$ 0.05 = \\Phi\\left( \\frac{(x - \\mu)}{\\sigma}\\right) $$ \n",
       "\n",
+      "$\\Phi$ being the [cumulative distribution for the normal distribution](http://en.wikipedia.org/wiki/Normal_distribution#Cumulative_distribution)\n",
+      "\n",
       "\n",
       "\n",
       "\n"
