Canonicity results for mu-calculi: an algorithmic approach

  title={Canonicity results for mu-calculi: an algorithmic approach},
  author={Willem Conradie and A. P. K. Craig},
  journal={J. Log. Comput.},
We investigate the canonicity of inequalities of the intuitionistic mu-calculus. The notion of canonicity in the presence of fixed point operators is not entirely straightforward. In the algebraic setting of canonical extensions we examine both the usual notion of canonicity and what we will call tame canonicity. This latter concept has previously been investigated for the classical mu-calculus by Bezhanishvili and Hodkinson. Our approach is in the spirit of Sahlqvist theory. That is, we… 

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