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Non-locally modular regular types in classifiable theories

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 Added by Bradd Hart
 Publication date 2019
  fields
and research's language is English




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We introduce the notion of strong $p$-semi-regularity and show that if $p$ is a regular type which is not locally modular then any $p$-semi-regular type is strongly $p$-semi-regular. Moreover, for any such $p$-semi-regular type, domination implies isolation which allows us to prove the following: Suppose that $T$ is countable, classifiable and $M$ is any model. If $pin S(M)$ is regular but not locally modular and $b$ is any realization of $p$ then every model $N$ containing $M$ that is dominated by $b$ over $M$ is both constructible and minimal over $Mb$.

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