Singular problems in optimal control—a survey

@inproceedings{Bell1975SingularPI,
  title={Singular problems in optimal control—a survey},
  author={David B. Bell},
  year={1975}
}
Singular controls have appeared rather frequently in dynamic optimization problems during the last two decades. Although special methods have been effective in analysing these singular problems, it is only recently that a unifying theory has been developed. This survey paper traces the early developments in the subject through to the most recent work of Jacobson and others in the establishment of necessary, sufficient, and necessary and sufficient conditions for optimality of singular extremals… CONTINUE READING