2 papers
math.LO2024
Definable henselian valuations in positive residue characteristic
Margarete Ketelsen, Simone Ramello, Piotr Szewczyk
We study the question of -definability of non-trivial henselian valuation rings. Building on previous work of Jahnke and Koenigsmann, we provide a char…
math.FA2019
Caristi-Kirk and Oettli-Théra Ball Spaces and applications
Piotr Błaszkiewicz, Hanna Ćmiel, Alessandro Linzi +1
Based on the theory of ball spaces introduced by Kuhlmann and Kuhlmann we introduce and study Caristi-Kirk and Oettli-Théra ball spaces. We show that if the underlying metric space…