Abstract
We study the properties of the language of Stratified Sets (first-order logic with ∈ and a stratification condition) as used in TST, TZT, and (with stratifiability instead of stratification) in Quine's NF. We find that the syntax forms a nominal algebra for substitution and that stratification and stratifiability imply confluence and strong normalisation under rewrites corresponding naturally to β-conversion.
Original language | English |
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Article number | 12 |
Journal | Logical Methods in Computer Science |
Volume | 14 |
Issue number | 2 |
DOIs | |
Publication status | Published - 22 May 2018 |