There is a typo in the 2nd paragraph of Example 4 in page 5. In the sentence "The weight of each pRoute is as follows: w(T_1[2:4]) = 1, w(T_2[1:4]) = 1/2, w(T_3[1:3]) = 1, w(T_1[1:4]) = 1/2.", the final weight "w(T_1[1:4]) = 1/2" shoud be replaced by "w(T_4[1:4]) = 1/2". Thanks to Uri Alon who is a PhD student from the Technion, Israel for finding this typo. [18th of Dec., 2017]