A many-sorted interpolation theorem for $L(Q)$
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- by David R. Guichard PDF
- Proc. Amer. Math. Soc. 80 (1980), 469-474 Request permission
Abstract:
Let L be a many-sorted relational language with $\in$ and consider the logic ${L_{{\omega _1}\omega }}(Q)$, infinitary logic with a monotone quantifier. We prove a version of Fefermanโs Interpolation Theorem for this logic. We then use the theorem to show that for a one-sorted language L and a countable admissible fragment ${L_A}$ of ${L_{{\omega _1}\omega }}(Q)$, any sentence which persists for end extensions is equivalent to a $\Sigma$ sentence.References
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Additional Information
- © Copyright 1980 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 80 (1980), 469-474
- MSC: Primary 03C75; Secondary 03C80
- DOI: https://doi.org/10.1090/S0002-9939-1980-0581007-8
- MathSciNet review: 581007