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math.LO2025
Maximal WAP and tame quotients of type spaces
Krzysztof Krupiński, Adrián Portillo
We study maximal WAP and tame (in the sense of topological dynamics) quotients of , where is a sufficiently saturated (called monster) model of a…
math.LO2023★ 3 cited
Maximal stable quotients of invariant types in NIP theories
Krzysztof Krupiński, Adrián Portillo
For a NIP theory , a sufficiently saturated model of , and an invariant (over some small subset of ) global type , we prove that there exists…
math.LO2021
On stable quotients
Krzystof Krupiński, Adrián Portillo
We solve two problems from the paper "On maximal stable quotients of definable groups in NIP theories" by M. Haskel and A. Pillay, which concern maximal stable quotients of groups…