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Deciding the First Level of the $mu$-calculus Alternation Hierarchy (BibTeX)

  author = {Ralf K{\"u}sters and Thomas Wilke},
  title = {{Deciding the First Level of the $\mu$-calculus Alternation Hierarchy}},
  booktitle = {FSTTCS 2002: Foundations of Software Technology and Theoretical Computer Science --- 22nd Conference},
  pages = {241--252},
  year = 2002,
  editor = {M.~Agrawal and A.~Seth},
  volume = 2556,
  series = {Lecture Notes in Computer Science},
  publisher = {Springer-Verlag},
  abstract = {We show that the following problem is decidable and complete for deterministic exponential time. Given a formula of modal mu-calculus, determine if the formula is equivalent to a formula without greatest fixed point operators. In other words, we show that the first level of the mu-calculus fixed point alternation hierarchy is decidable in deterministic exponential time.}