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Home » DDC - Model Theory Seminar: Externally definable henselian valuation rings

Seminar

DDC - Model Theory Seminar: Externally definable henselian valuation rings November 16, 2020 (08:00 AM PST - 09:00 AM PST)
Parent Program:
Location: MSRI: Online/Virtual
Speaker(s) Franziska Jahnke (Westfälische Wilhelms-Universität Münster)
Description

To participate in this seminar, please register here: https://www.msri.org/seminars/25206

Video

Externally Definable Henselian Valuation Rings

Abstract/Media

To participate in this seminar, please register here: https://www.msri.org/seminars/25206

Abstract:

We investigate the question which henselian valuation rings are (externally) definable in the language of rings on a field K. The situation is very different depending on whether the residue field is algebraically closed or not. The main tool involved is the definability of the canonical p-henselian valuations (J.-Koenigsmann '15). In residue characteristic 0, our question has a satisfying answer - in positive characteristic, many open questions remain. (Work in progress)

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Externally Definable Henselian Valuation Rings

H.264 Video 25433_28991_8631_Externally_Definable_Henselian_Valuation_Rings.mp4