I. About the XIth International Symposium on Mathematical Programming -- Program and Organizing Committee -- Welcoming Addresses -- List of Sponsors -- The Fulkerson Prize and the Dantzig Prize 1982 -- II. Mathematical Programming: The State of the Art - Bonn 1982 -- Predictor-Corrector and Simplicial Methods for Approximating Fixed Points and Zero Points of Nonlinear Mappings -- Polyhedral Theory and Commutative Algebra -- Reminiscences About the Origins of Linear Programming -- Penalty Functions -- Applications of the FKG Inequality and its Relatives -- Semi-Infinite Programming and Applications -- Applications of Matroid Theory -- Recent Results in the Theory of Machine Scheduling -- Submodular Functions and Convexity -- Recent developments in Algorithms and Software for Trust Region Methods -- Variable Metric Methods for Constrained Optimization -- Polyhedral Combinatorics -- Generalized Equations -- Generalized Subgradients in Mathematical Programming -- Nondegeneracy Problems in Cooperative Game Theory -- Conic Methods for Unconstrained Minimization and Tensor Methods for Nonlinear Equations -- Min-Max Results in Combinatorial Optimization -- Generalized Gradient Methods of Non-Differentiable Optimization Employing Space Dilatation Operations -- The Problem of the Average Speed of the Simplex Method -- Solution of Large Linear Systems of Equations by Conjugate Gradient Type Methods -- Stochastic Programming: Solution Techniques and Approximation Schemes -- III. Scientific Program -- IV. List of Authors.