A Polynomial-time Algorithm for the Bistable Roommates Problem

In a recent paper, Weems introduced the bistable matching problem, and asked if a polynomial-time algorithm exists to decide the feasibility of the bistable roommates problem. We resolve this question in the affirmative using linear programming. In addition, we show that several (old and new) results for the bistable marriage and roommates problem become transparent using the polyhedral approach. This technique has been used recently by the authors to address classical stable matching problems. © 2001 Elsevier Science (USA)