Remark on the Star-Height-Problem

@article{Thomas1981RemarkOT,
  title={Remark on the Star-Height-Problem},
  author={W. Thomas},
  journal={Theor. Comput. Sci.},
  year={1981},
  volume={13},
  pages={231-237}
}
  • W. Thomas
  • Published 1981
  • Computer Science, Mathematics
  • Theor. Comput. Sci.
Abstract A method is presented which allows to construct general regular expressions of star-height 1 for a class of rather ‘complicated’ regular events. (General regular expressions include an operation symbol for complement.) If events of greater general star-height exist (which is still open), they must be more complex than those accessible by this method. An event which seems to be of this kind is suggested at the end of the paper. 
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