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October 1999 An ultrapower which does not preserve the truth of a $\prod_{2}$ sentence
Nobutaka Tsukada
Tsukuba J. Math. 23(2): 225-228 (October 1999). DOI: 10.21099/tkbjm/1496163868

Abstract

We construct a ‘counterexample’ to Łoś’ theorem in the ordered Mostowski model for set theory ZFA.

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Nobutaka Tsukada. "An ultrapower which does not preserve the truth of a $\prod_{2}$ sentence." Tsukuba J. Math. 23 (2) 225 - 228, October 1999. https://doi.org/10.21099/tkbjm/1496163868

Information

Published: October 1999
First available in Project Euclid: 30 May 2017

zbMATH: 0951.03045
MathSciNet: MR1715474
Digital Object Identifier: 10.21099/tkbjm/1496163868

Rights: Copyright © 1999 University of Tsukuba, Institute of Mathematics

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Vol.23 • No. 2 • October 1999
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