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 JProf. Dr. Franziska Jahnke.

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

Talks

"Definable Henselian valuations in positive residue characteristic" (joint with Simone Ramello and Piotr Szewczyk), 9 November 2023, GRK 2240, Düsseldorf. notes
"Definability of Henselian valuations in positive (residue) characteristic" (joint with Simone Ramello and Piotr Szewczyk), 4 October 2023, PhDs in Logic, Granada. slides
"C_i-fields and a tiny bit of model theory", 23 March 2023, Informal PhD Seminar, Münster.
"Quasi-finite axiomatiability in the class of finitely generated rings", 1 September 2022, International Seminar, Dresden.
"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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