Margarete Ketelsen

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Research
Teaching
Miscellanea

Institut für Mathematische Logik und Grundlagenforschung
Fachbereich Mathematik und Informatik
Universität Münster
Einsteinstraße 62
48149 Münster

Office: 110.020 in Orléans-Ring 10
Email: firstname.lastname@uni-muenster.de
Phone: +49 251 83-36870

My name is Margarete Ketelsen and I am a PhD student in the Cluster of Excellence "Mathematics Münster: Dynamics - Geometry - Structure". My advisor is Prof. Dr. Franziska Jahnke.

I am interested in the model theory of valued fields, in particular: tame valued fields, perfectoid fields & tilting and (relative) quantifier elimination, also definability of valuations.

Preprint

"Definable Henselian valuations in positive residue characteristic" (with Simone Ramello and Piotr Szewczyk), accepted for publication in J. Symb. Log.

Talks

Notes and Slides from past talks

"Definable Henselian valuations in positive residue characteristic" (about joint work with Simone Ramello and Piotr Szewczyk),
- 13 March 2024, Young Women in Model Theory and Applications, Hausdorff Center for Mathematics in Bonn. notes
- 7 February 2024, LLAMA Seminar, ILLC Amsterdam. notes
- 9 November 2023, GRK 2240, Düsseldorf. notes
- 4 October 2023, PhDs in Logic, Granada. slides
"A proof of Greenberg's Theorem using ultrapowers", 19 August 2021, ALGAR 2021 Summer School, Antwerp. slides

Theses

Master's thesis: "Quasi-finite axiomatizability in the class of finitely generated rings", September 2022.
Bachelor's thesis (in German): "Polynomgleichungen über henselschen Bewertungsringen" (Polynomial equations over Henselian valuation rings), July 2020.

both under the supervision of Prof. Dr. Arno Fehm and Dr. Philip Dittmann at the Technische Universität Dresden.

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