Approximation, Randomization, and Combinatorial Optimization. Algorithms and Techniques 16th International Workshop, APPROX 2013, and 17th International Workshop, RANDOM 2013, Berkeley, CA, USA, August 21-23, 2013. Proceedings - Raghavendra, Prasad; Raskhodnikova, Sofya; Jansen, Klaus; Rolim, José D. P. (Springer Berlin Heidelberg : Imprint: Springer, 2013)