Approximation, Randomization, and Combinatorial Optimization. Algorithms and Techniques : 15th International Workshop, APPROX 2012, and 16th International Workshop, RANDOM 2012, Cambridge, MA, USA, August 15-17, 2012, Proceedings - Gupta, Anupam (Herausgeber); Jansen, Klaus (Herausgeber); Rolim, José D.P (Herausgeber); SERVEDIO, ROCCO (Herausgeber) (Theoretical Computer Science and General Issues, 2012)