D. Hoffmann

collaborators

2 papers

math.DS2026

Haar decompression and amenability of Ellis flows

Daniel Max Hoffmann, Krzysztof KrupiÅski

Let $(X, G)$ be a tame flow and let $K$ be an Ellis group of its enveloping semigroup $E (X, G)$ . Although $K$ is a compact Hausdorff topological group in its $I ¨ $ -topology, the inclu…

math.LO2025

Of model completeness and algebraic groups

Daniel Max Hoffmann, Piotr Kowalski, Chieu-Minh Tran +1

We show that if G is a split semisimple algebraic group over a model complete field K, then the groups G(K) and G(K)' (the commutator group which is a ``Chevalley group'' as for ex…