IEOR 3608, Fall 2004: Homework 7

Assigned: Wednesday, November 10, 2003
Due: Wednesday, November 17, 2003, at the beginning of class

General Instructions

  1. Please review the course information.
  2. You must write down with whom you worked on the assignment. If this changes from problem to problem, then you should write down this information separately with each problem.
  3. Numbered problemnnns are all from the textbook Introduction to Mathematical Programming, 4th Edition.

Problems

  1. p. 430, A4 and A5. Use the Ford Fulkerson algorithm and show your work. Be sure to show the residual graphs.
  2. p. 430, B12
  3. p. 454, A4. You only need to formulate the problem.
  4. p. 455, B8. You only need to formulate the problem.
  5. The stable roommates problem is like the stable marriage problem, except that you are not restricted to pairing a man with a woman. In other words, you are given a set of n people, and each person has ranked the other n-1 people in order. You want to pair the people up. An unstable pair consists of 2 people, each of whom rank the other higher than their current roomate. A solution is stable if there are no unstable pairs. Give an example of an input to the stable roommates problem for which it is impossible to find a stable solution. (Hint: there is an example with four people).


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