Arbeitsgemeinschaft: Topological Cyclic Homology

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Date
2018
Authors
Volume
15
Issue
Journal
Series Titel
Oberwolfach reports : OWR
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Publisher
Zürich : EMS Publ. House
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Abstract

Introduced by Bökstedt-Hsiang-Madsen in the nineties, topological cyclic homology is a manifestation of the dual visions of Connes-Tsygan and Waldhausen to extend de Rham cohomology to a noncommutative setting and to replace algebra by higher algebra. The cohomology theory that ensues receives a denominator-free Chern character from algebraic K-theory, used by Hesselholt-Madsen to evaluate the p-adic K-theory of p-adic fields. More recently, Bhatt-Morrow-Scholze have defined a “motivic” filtration of topological cyclic homology and its variants, the filtration quotients of which give rise to their denominator-free p-adic Hodge theory AΩ.

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