IPCO 2011: None IPCO 2010: None IPCO 2008 summer school: Michele Conforti: Extended Formulations in Integer Programming and Combinatorial Optimization Franz Rendl: Solution methods for SDP arising from combinatorial optimization problems Martin Skutella: Dynamic Network Flows IPCO 2007 summer school: ??? IPCO 2005 summer school: Martin Dyer: Approximate Counting. Daniel Spielman: Fast, Randomized Algorithms for Partitioning, Sparsification, and the Solution of Linear Systems. Jiri Matousek: Generalized Linear Programming. IPCO 2004 summer school: Joan Feigenbaum: Incentives and Internet Computation. Rakesh Vohra: Linear Inequalities and Mechanism Design. Tim Roughgarden: The Price of Anarchy. IPCO 2002 summer school: Dimitris Bertsimas: Robust Discrete Optimization. Santosh Vempala: Set-Pair Formulations for Network Design. David Karger: Randomized Algorithms for Cut and Flow Problems. IPCO 2001 summer school: EÉva Tardos: - Techniques for approximation algorithms: Local search for a classification problem related to multi-way cuts. - Approximation algorithms via linear programming: A general approach. - Approximation algorithms via primal-dual method: Some clustering problems. - Approximation algorithms in a game theoretic setting. Dan Bienstock: - The maximum concurrent flow problem - a difficult combinatorial linear program that is easy to approximate. - A survey of provably good methods for approximately solving linear programs. - Oblivious rounding and derivatives. - Computational experiments with approximation algorithms for linear programming -- survey and new results.