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On a set theory of bernays

Published online by Cambridge University Press:  12 March 2014

Leslie H. Tharp*
Affiliation:
Massachusetts Institute of Technology

Extract

We are concerned here with the set theory given in [1], which we call BL (Bernays-Levy). This theory can be given an elegant syntactical presentation which allows most of the usual axioms to be deduced from the reflection principle. However, it is more convenient here to take the usual Von Neumann-Bernays set theory [3] as a starting point, and to regard BL as arising from the addition of the schema

where S is the formal definition of satisfaction (with respect to models which are sets) and ┌φ┐ is the Gödel number of φ which has a single free variable X.

Type
Research Article
Copyright
Copyright © Association for Symbolic Logic 1967

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References

[1]Bernays, P., Zur Frage der Unendlichkeitsschemata in der Axiomatischen Mengenlehre, Essays on the foundations of mathematics, Jerusalem, 1961, pp. 349.Google Scholar
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