Domination decomposition conjecture for invariant types in o-minimal theories

Let TT be an o-minimal theory and let UT\mathfrak U\models T be a monster model. A type over UU is invariant over a small set if it is invariant over some small subset of the monster model. A product of 11-types is a Morley product of types in one variable. Domination decomposition conjecture. Every type over UU that is invariant over a small set is domination-equivalent to a product of 11-types. The property is known for real closed fields, divisible ordered abelian groups, and o-minimal theories with no non-simple types in the stated sense; it is conjectured to hold for every o-minimal structure.

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Primary source

Pablo Andújar Guerrero, Pantelis E. Eleftheriou and Rosario Mennuni, “Orthogonality and domination in o-minimal expansions of ordered groups”, arXiv:2503.17120 (2025).

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