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math.LO2020
Bohr compactifications of groups and rings
Jakub Gismatullin, Grzegorz Jagiella, Krzysztof Krupinski
We introduce and study model-theoretic connected components of rings as an analogue of model-theoretic connected components of definable groups. We develop their basic theory and u…
math.LO2020★ 2 cited
On first order amenability
Ehud Hrushovski, Krzysztof Krupiński, Anand Pillay
We introduce the notion of first order amenability, as a property of a first order theory : every complete type over , in possibly infinitely many variables, extends…