143870
20181203021808.0
ARTICLE
A general framework for homotopic descent and codescent
Journal Articles
In this paper we elaborate a general homotopy-theoretic framework in which to study problems of descent and completion and of their duals, codescent and cocompletion. Our approach to homotopic (co)descent and to derived (co)completion can be viewed as $\infty$-category-theoretic, as our framework is constructed in the universe of simplicially enriched categories, which are a model for $(\infty, 1)$-categories. We provide general criteria, reminiscent of Mandell's theorem on $E_{\infty}$-algebra models of $p$-complete spaces, under which homotopic (co)descent is satisfied. Furthermore, we construct general descent and codescent spectral sequences, which we interpret in terms of derived (co)completion and homotopic (co)descent. We prove that Baum-Connes and Farrell-Jones-type isomorphism conjectures for assembly can be expressed in the language of derived cocompletion and show that a number of very well-known spectral sequences, such as the unstable and stable Adams spectral sequences, the Adams-Novikov spectral sequence and the descent spectral sequence of a map, are examples of general (co)descent spectral sequences. There is also a close relationship between the Lichtenbaum-Quillen conjecture and homotopic descent along the Dwyer-Friedlander map from algebraic K-theory to etale K-theory.
Hess, Kathryn
105396
240499
preprint
URL
http://arxiv.org/abs/1001.1556
621915
n/a
http://infoscience.epfl.ch/record/143870/files/1001.1556v1.pdf
UPHESS
252139
U10968
oai:infoscience.tind.io:143870
article
GLOBAL_SET
SV
GR-HE-ARTICLE-2010-001
EPFL
SUBMITTED
REVIEWED
ARTICLE