Abstract
Abstract
We study the
$\kappa $
-Borel-reducibility of isomorphism relations of complete first-order theories by using coloured trees. Under some cardinality assumptions, we show the following: For all theories T and T’, if T is classifiable and T’ is unsuperstable, then the isomorphism of models of T’ is strictly above the isomorphism of models of T with respect to
$\kappa $
-Borel-reducibility.
Publisher
Cambridge University Press (CUP)
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