Prof. dr hab. Krzysztof Krupiński Instytut Matematyczny Uniwersytetu Wrocławskiego Pl. Grunwaldzki 2/4 50-384 Wrocław, Poland e-mail: kkrup@math.uni.wroc.pl

Interests

• topological dynamics methods in model theory,
• stability theory and generalizations (so-called neostability), particularly groups and fields from this point of view,
• applications of model theory and topological dynamics to additive combinatorics,
• Lascar strong types, Galois groups of first order theories, and spaces of strong types,
• profinite structures (in particular, small profinite groups and rings in this context); and, more generally, Polish structures (in particular, small compact $G$-groups),
• measures in model theory,
• $\omega$-categorical groups and rings,
• minimal and quasi-minimal structures.

Publications

• K. Krupiński, L. Newelski, On bounded type definable equivalence relations ps, Notre Dame Journal of Formal Logic (43), 231-242, 2002.
• K. Krupiński, Products of finite abelian groups as profinite groups ps, Journal of Algebra (288), 556-582, 2005.
• K. Krupiński, Abelian profinite groups ps, Fundamenta Mathematicae (185), 41-59, 2005.
• T. Blossier, K. Krupiński, A special thin type ps, Illinois Journal of Mathematics (49), 281-290, 2005.
• K. Krupiński, Profinite structures interpretable in fields ps, Annals of Pure and Applied Logic 142, 19-54, 2006.
• K. Krupiński, F. Wagner, Small profinite groups and rings ps, Journal of Algebra (306), 494-506, 2006.
• C. Ealy, K. Krupiński, A. Pillay, Superrosy dependent groups having finitely satisfiable generics pdf, Annals of Pure and Applied Logic (151), 1-21, 2008.
• K. Krupiński, Fields interpretable in rosy theories ps, Israel Journal of Mathematics (175), 421-444, 2010.
• K. Krupiński, Fields interpretable in superrosy groups with NIP (the non-solvable case) ps, Journal of Symbolic Logic (75), 372-386, 2010.
• K. Krupiński, Some model theory of Polish structures ps, Transactions of the American Mathematical Society (362), 3499-3533, 2010.
• K. Krupiński, Generalizations of small profinite structures pdf, Journal of Symbolic Logic (75), 1147-1175, 2010.
• K. Krupiński, A. Pillay, On stable fields and weight pdf, Journal of the Institute of Mathematics of Jussieu (10), 349-358, 2011.
• K. Krupiński, On relationships between algebraic properties of groups and rings in some model-theoretic contexts pdf, Journal of Symbolic Logic (76), 1403-1417, 2011.
• K. Krupiński, On $\omega$-categorical groups and rings with NIP pdf, Proceedings of the American Mathematical Society (140), 2501-2512, 2012.
• J. Dobrowolski, K. Krupiński, On $\omega$-categorical, generically stable groups pdf, Journal of Symbolic Logic (77), 1047-1056, 2012.
• J. Dobrowolski, K. Krupiński, On $\omega$-categorical, generically stable groups and rings pdf, Annals of Pure and Applied Logic (164), 802-812, 2013.
• K. Krupiński, F. Wagner, Small, nm-stable compact G-groups pdf, Israel Journal of Mathematics (194), 907-933, 2013.
• K. Krupiński, P. Tanović, F. Wagner, Around Podewski's conjecture pdf, Fundamenta Mathematicae (222), 175-193, 2013.
• K. Krupiński, A. Pillay, S. Solecki, Borel equivalence relations and Lascar strong types pdf, Journal of Mathematical Logic (13), 1350008 (37 pages), 2013.
• J. Dobrowolski, K. Krupiński, Locally finite profinite rings pdf, Journal of Algebra (401), 161-178, 2014.
• T. Gogacz, K. Krupiński, On regular groups and fields pdf, Journal of Symbolic Logic (79), 826-844, 2014.
• K. Krupiński, Superrosy fields and valuations pdf, Annals of Pure and Applied Logic (166), 342-357, 2015.
• J. Gismatullin, K. Krupiński, On model-theoretic connected components in some group extensions pdf, Journal of Mathematical Logic (15), 1550009 (51 pages), 2015.
• K. Krupiński, T. Rzepecki, Smoothness of bounded invariant equivalence relations pdf, Journal of Symbolic Logic (81), 326-356, 2016.
• K. Krupiński, A. Pillay, Generalized Bohr compactification and model-theoretic connected components pdf, Mathematical Proceedings of the Cambridge Philosophical Society (163), 219-249, 2017.
• K. Krupiński, Definable topological dynamics pdf, Journal of Symbolic Logic (82), 1080-1105, 2017.
• K. Krupiński, A. Pillay, T. Rzepecki, Topological dynamics and the complexity of strong types pdf, Israel Journal of Mathematics (228), 863-932, 2018.
• K. Krupiński, A. Pillay, Amenability, definable groups, and automorphism groups pdf, Advances in Mathematics (345), 1253-1299, 2019.
• K. Krupiński, L. Newelski, P. Simon, Boundedness and absoluteness of some dynamical invariants in model theory pdf, Journal of Mathematical Logic (19), 1950012 (55 pages), 2019.
• K. Krupiński, T. Rzepecki, Galois groups as quotients of Polish groups pdf, Journal of Mathematical Logic (20), 2050018 (48 pages), 2020.
• E. Hrushovski, K. Krupiński, A Pillay, Amenability and definability pdf. This preprint is not meant to be published, as it has been divided (with some changes) into the next two papers.
• E. Hrushovski, K. Krupiński, A Pillay, Amenability, connected components, and definable actions pdf, Selecta Mathematica New Series (28), 16, 2022.
• E. Hrushovski, K. Krupiński, A Pillay, On first order amenability pdf, Selecta Matheamtica New Series, to appear.
• K. Krupiński, A. Pillay, On the topological dynamics of automorphism groups: a model-theoretic perspective pdf, Archive for Mathematical Logic (62), 505–529, 2023.
• K. Krupiński, J. Lee, S. Moconja, Ramsey theory and topological dynamics for first order theories pdf, Transactions of the American Mathematical Society (375), 2553-2596, 2022.
• J. Gismatullin, G. Jagiella, K. Krupiński, Bohr compactifications of groups and rings pdf, Journal of Symbolic Logic (88), 1103 - 1137, 2023.
• K. Krupiński, T. Rzepecki, Generating ideals by additive subgroups of rings pdf, Annals of Pure and Appplied Logic (173), 103-119, 2022.
• A. Chernikov, E. Hrushovski, A. Kruckman, K. Krupiński, S. Moconja, A. Pillay, N. Ramsey, Invariant measures in simple and in small theories pdf, Journal of Mathematical Logic (23), 2250025 (37 pages), 2023.
• K. Krupiński, A. Portillo, On stable quotients pdf, Notre Dame Journal of Formal Logic (63), 373-394, 2022.
• K. Krupiński, Locally compact models for approximate rings pdf, Mathematische Annalen (389), 719-743, 2024.
• K. Krupiński, A. Portillo, Maximal stable quotients of invariant types in NIP theories pdf, Journal of Symbolic Logic (90), 918-942, 2025.
• K. Krupiński, A. Pillay, Generalized locally compact models for approximate groups pdf, submitted.
• A. Chernikov, K. Gannon, K. Krupiński, Definable convolution and idempotent Keisler measures III. Generic stability, generic transitivity, and revised Newelski's conjecture pdf, submitted.
• K. Krupiński, A. Portillo, Maximal WAP and tame quotients of type spaces pdf, submitted.
• K. Gannon, D. Hoffmann, K. Krupiński, Convolution semigroups for automorphism dynamics pdf, preprint.

Work in progress

• Structural and classification results on approximate subrings (with S. Machado).
• Definable locally compact models of definable sets, in particular of approximate substructures, with applications to structural results (with M. Rzepecki).
• Bohr compactifications of first order topological structures (with G. Jagiella).
• Topological dynamics and Ramsey theory in model theory and in an abstract context (with J. Lee and S. Moconja).
• Ramsey properties of amalgamation classes and theories (with N. Meir).
• Grothendieck groups of Ellis semigroups (with T. Rzepecki).
• Topological dynamics and definability patterns for measures, convolution product of Keisler measures (with K. Gannon and D. Hoffmann).
• Hrushovski's "Cores" of theories and their groups of automorphisms, Ellis groups, and variants.
• Topological dynamics below a given ambit and the generalized externally definable Bohr compactification (with A. Pillay and A. Zucker).

Detailed CV

Szczegółowy życiorys

Topological dynamics in model theory

Algebra 1R

Teoria stabilnosci I

Stable groups

Theories with NIP