Total Cofibres of Diagrams of Spectra

Details Total Cofibres of Diagrams of Spectra Total Cofibres of Diagrams of Spectra

2005-08-22

arxiv.org/abs/math/0508406v1

New York Journal of Mathematics 11 (2005), pp. 333-343

Mathematics

Algebraic Topology

11 pages; LaTeX source code uses Paul Taylor's "diagrams" and "QED" macro packages; some diagrams may not display correctly wi

Scientific paper

If Y is a diagram of spectra indexed by an arbitrary poset C together with a specified sub-poset D, we define the total cofibre \Gamma (Y) of Y as the strict cofibre of the map from hocolim_D (Y) to hocolim_C (Y). We construct a comparison map from the homotopy limit of Y to a looping of a fibrant replacement of Gamma (Y), and characterise those poset pairs (C,D) for which this comparison map is a stable equivalence. The characterisation is given in terms of stable cohomotopy of spaces related to C and D. For example, if C is a finite polytopal complex with underlying space an m-ball with boundary sphere D, then holim_C (Y) and \Gamma(Y) agree up to m-fold looping and up to stable equivalence. As an application of the general result we give a spectral sequence for the homotopy groups of \Gamma(Y) with E_2-term involving higher derived inverse limits of \pi_* (Y), generalising earlier constructions for space-valued diagrams indexed by the face lattice of a polytope.

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