© 1999 by Oxford University Press
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Sets, types and type-checking
Department of Computing Science, University of Essex, Colchester, Essex, UK E-mail: turnr@essex.ac.uk
The underlying set theory of the Z-specification language is said to be a typed set theory. There are two interpretations of this to be found in the literature. One is based upon Simple Type theory and the other on set theory plus a type assignment system. We establish their equivalence.
Keywords: Z, specification, set theory, type assignment, type theory