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arXiv · 2109.08943

Theories with few non-algebraic types over models, and their decompositions

Samuel Braunfeld·Michael C Laskowski
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Abstract

We consider several ways of decomposing models into parts of bounded size forming a congruence over a base, and show that admitting any such decomposition is equivalent to mutual algebraicity at the level of theories. We also show that a theory $T$ is mutually algebraic if and only if there is a uniform bound on the number of coordinate-wise non-algebraic types over every model, regardless of its cardinality.

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Samuel Braunfeld, Michael C Laskowski. 2021-09-18. Theories with few non-algebraic types over models, and their decompositions. https://doi.org/10.1090/proc%2F15956

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