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Implicit definability and infinitary languages1

Published online by Cambridge University Press:  12 March 2014

Kenneth Kunen*
Affiliation:
Stanford University

Extract

In this paper we define the notions of invariant implicit definability (i.i.d.) and semi-invariant implicit definability (s.i.i.d.) on ε-models, A, of a certain weak set theory. These notions are intended to be the analogs of recursiveness and recursive enumerability, respectively. Following Barwise, with each A is associated an infinitary language whose formulas are elements of A.

Type
Research Article
Copyright
Copyright © Association for Symbolic Logic 1968

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Footnotes

1

This work was supported by ε NSF Graduate Fellowship.

References

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