The topology conjecture for proper dp-minimal expansions of
The topology conjecture for proper dp-minimal expansions of
Let be an expansion of , and say that it is proper if it is not interdefinable with . Say that eliminates if, uniformly in parameters, it cannot define finite sets of arbitrarily large cardinality. A group topology on is non-discrete if the singleton topology is not the topology in question.
Topology conjecture. Any proper dp-minimal expansion of which eliminates defines a non-discrete group topology on .
The conjecture proposes that all proper dp-minimal expansions with this finiteness property arise from a non-discrete group topology, complementing the known result that expansions failing to eliminate define the order .
Sources & referencesView supporting material
Primary source
Erik Walsberg, “Dp-minimal expansions of (Z,+) via dense pairs via Mordell-Lang”, arXiv:2004.06847 (2020).
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