Systems and Optimization : Proceedings of the Twente Workshop Enschede The Netherlands April 16 18 1984 Dynamic games and incentives Recent results on nonlinear model matching A criterion for optimality and its application to parametric programming Structure theory for realizations of finite volterra series On the order reduction of linear optimal control systems in critical cases Sensitivity analysis in nonlinear programming under second order assumptions Optimal disturbance attenuation with control weighting Path following methods for Kuhn Tucker curves by an active index set strategy Two case studies in parametric semi infinite programming Disturbance attenuation by output feedback Time reversal of diffusion processes and non linear smoothing Consensus in distributed estimation Remarks on local controllability of nonlinear control systems.