Merge pull request #57 from JayHarsha/patch-1

Update airlineplanning comments for constraint 2.ipynb

Author: Marika-K

aviation_planning/airlineplanning.ipynb

@@ -945,7 +945,7 @@
     "\n",
     "Next, we make sure that a flight $f$ is operated by an aircraft $a$ only if $f$ is in the route taken by $a$.\n",
     "The quantity $\\sum_{f' \\in \\delta^+(f)} y_{a,f,f'}$ gives us the number of arcs that leave flight $f$; there can be either $0$ arcs or $1$ arc. \n",
-    "If this quantity is $0$, then aircraft $f$ does not traverse flight $f$, and we set $x_{a,f}$ to be $0$.\n",
+    "If this quantity is $0$, then aircraft $a$ does not traverse flight $f$, and we set $x_{a,f}$ to be $0$.\n",
     "This constraint can be mathematically expressed by the following inequality for each aircraft $a$ and flight $f$ in $F_a$\n",
     "\n",
     "\\begin{aligned}  \n",