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Elke Enning

Ferdinand Wagner (Münster): Refined THH & Cohomology Theories. Oberseminar Topologie.

Monday, 27.04.2026 14:15 im Raum MB4

Mathematik und Informatik

Topological Hochschild homology (THH) has been used successfully to construct prismatic cohomology, the most powerful cohomology theory that we currently have for formal schemes over Z_p. But for rigid-analytic varieties over Q_p, or even global objects like varieties over Q, THH is less useful: For rational inputs, THH will always vanish modulo p, and so it can't have any interesting comparisons to, say, étale cohomology with torsion coefficients. In this talk, I'll explain a refinement of THH (due to Efimov and Scholze) that overcomes these issues, and I'll show a few promising computations. I'll also sketch how one should be able to recover Scholze's analytic Habiro cohomology from refined THH.



Angelegt am 13.04.2026 von Elke Enning
Geändert am 21.04.2026 von Elke Enning
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