Journal of Symbolic Logic

Independence, dimension and continuity in non-forking frames

Adi Jarden and Alon Sitton

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The notion $J$ is independent in $(M,M_0,N)$ was established by Shelah, for an AEC (abstract elementary class) which is stable in some cardinal $\lambda$ and has a non-forking relation, satisfying the good $\lambda$-frame axioms and some additional hypotheses. Shelah uses independence to define dimension.

Here, we show the connection between the continuity property and dimension: if a non-forking satisfies natural conditions and the continuity property, then the dimension is well-behaved.

As a corollary, we weaken the stability hypothesis and two additional hypotheses, that appear in Shelah's theorem.

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J. Symbolic Logic, Volume 78, Issue 2 (2013), 602-632.

First available in Project Euclid: 15 May 2013

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Jarden, Adi; Sitton, Alon. Independence, dimension and continuity in non-forking frames. J. Symbolic Logic 78 (2013), no. 2, 602--632. doi:10.2178/jsl.7802140.

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