Arnold Beckmann, Martin Goldstern and Norbert Preining
Order 2008, 25: 281-298
Publication year: 2008

We investigate the relation of countable closed linear orderings with respect to continuous monotone embeddability and show that there are exactly ℵ1 many equivalence classes with respect to this embeddability relation. This is an extension of Laver’s result, who considered (plain) embeddability, which yields coarser equivalence classes. Using this result we show that there are only ℵ0 many different Gödel logics.

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