Constructing illoyal algebra-valued models of set theory

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Authors
Publication date 08-2021
Journal Algebra Universalis
Article number 46
Volume | Issue number 82 | 3
Number of pages 19
Organisations
  • Interfacultary Research - Institute for Logic, Language and Computation (ILLC)
Abstract An algebra-valued model of set theory is called loyal to its algebra if the model and its algebra have the same propositional logic; it is called faithful if all elements of the algebra are truth values of a sentence of the language of set theory in the model. We observe that non-trivial automorphisms of the algebra result in models that are not faithful and apply this to construct three classes of illoyal models: tail stretches, transposition twists, and maximal twists.
Document type Article
Language English
Published at https://doi.org/10.1007/s00012-021-00735-4
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