Osnabrück, March 18-20, 2026
The research group Topology/Geometry at the Institute of Mathematics, Osnabrück University, Germany, will host a workshop named “Recent Advances in Motivic Cohomology: The Motivic Filtration for Algebraic K-theory” on the recent work of Tom Bachmann, Elden Elmanto, and Matthew Morrow, available under https://arxiv.org/abs/2508.09915. Tom Bachmann has agreed to be present and to give two talks, and further 10 talks will be given by selected participants. For this, we ask those participants who are willing to give a talk to indicate their two preferred topics; see also the descriptions below (a more detail program will appear here, as well).
Schedule
| Time | Wednesday | Thursday | Friday |
|---|---|---|---|
| 09:00-09:30 | Coffee | Coffee | Coffee |
| 09:30-10:30 | Overview (Tom Bachmann) | Syntomic cohomology 1 (Engelmann) | Main results 1 (Tom Bachmann) |
| 10:45-11:45 | Preliminaries | Syntomic cohomology 2 (Louis) | Main results 2 (Kipp) |
| 11:45-13:30 | Lunch | Lunch | Lunch |
| 13:30-14:30 | Motivic spectra (Shaikh) | The case of fields and Dedekind domains (Hesse) | |
| 14:45-15:45 | Motivic cohomology 1 (Zolotarev) | Cdh-motivic cohomology 1 (Mattis) | |
| 15:45-16:30 | Coffee | Coffee | |
| 16:30-17:30 | Motivic cohomology 2 (Bannwart) | Cdh-motivic cohomology 2 (Gieringer) | |
| 19:00 | Social Dinner |
Program
The talks are all based on sections of https://arxiv.org/abs/2508.09915, as follows:
Talk 1: Overview (Tom Bachmann)
Content: Section 1
Talk 2: Preliminaries (Neugebauer)
Content: Section 2
Talk 3: Motivic spectra (Shaikh)
Content: Section 3
Talk 4: Motivic cohomology 1 (Zolotarev)
Content: First half of section 4
Talk 5: Motivic cohomology 2 (Bannwart)
Content: Second half of section 4
Talk 6: Syntomic cohomology 1 (Engelmann)
Content: First half of section 5
Talk 7: Syntomic cohomology 2 (Louis)
Content: Second half of section 4
Talk 8: The case of fields and Dedekind domains (Hesse)
Content: Section 6
Talk 9: Cdh-motivic cohomology 1 (Mattis)
Content: Section 7
Talk 10: Cdh-motivic cohomology 2 (Gieringer)
Content: Section 8
Talk 11: Main results 1 (Tom Bachmann)
Content: Outline of the proofs
Talk 12: Main results 2 (Kipp)
Content: Details of the proofs
Organizers
Oliver Röndigs, Markus Spitzweck & Thor Wittich