Learn More
Optimal feedback controls of P D-or P ID-type can be approximated very efficiently by optimal open-loop feedback controls based on optimal open-loop controls. Extending the standard construction, stochastic optimal open-loop feedback controls are constructed by taking into account still the random parameter variations in the control system. Hence,(More)
  • K Ritter, Wasilkowski, +4 authors R Mennicken
  • 1997
We propose isotropic probability measures deened on classes of smooth multivariate functions. These provide a natural extension of the classical isotropic Wiener measure to multivariate functions from C 2r. We show that in the corresponding average case setting the minimal errors of algorithms that use n function values are ? n ?(d+4r+1)=2d and ? n(More)
  • 1