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    • CommentRowNumber1.
    • CommentAuthorUrs
    • CommentTimeAug 9th 2011

    stub for totalization

    • CommentRowNumber2.
    • CommentAuthorzskoda
    • CommentTimeAug 9th 2011
    • (edited Aug 9th 2011)

    Is this related to (one of the two) totalization(s) of a double complex in homological algebra and related totalizations in homological algebra ?

    • CommentRowNumber3.
    • CommentAuthorUrs
    • CommentTimeAug 9th 2011

    Good point, the terminology is a bit inconclusive in some places of the literature, I think. I have added the following paragraph to totalization:

    Formally the dual to totalization is geometric realization: where totalization is the end over a powering with Δ\Delta, realization is the coend over the tensoring.

    But various other operations carry names similar to “totalization”. For instance a total chain complex is related under Dold-Kan correspondence to the diagonal of a bisimplicial set – see Eilenberg-Zilber theorem. As discussed at bisimplicial set, this is weakly homotopy equivalent to the operation that is often called TotTot and called the total simplicial set of a bisimplicial set.

    • CommentRowNumber4.
    • CommentAuthorMike Shulman
    • CommentTimeAug 10th 2011

    Whereas the diagonal of a bisimplicial set is actually its geometric realization, considered as a simplicial object in sSet!

    • CommentRowNumber5.
    • CommentAuthorzskoda
    • CommentTimeAug 11th 2011
    • (edited Aug 11th 2011)
    • Paul Bressler, Alexander Gorokhovsky, Ryszard Nest, Boris Tsygan, Deformation quantization of gerbes, Advances in Mathematics 214 (2007) 230–266, pdf

    reviews the constructon of the totalization of a cosimplicial DGLA in Section 3.4 (defined as certain colimit) and “prove that isomorphism classes of descent data of a cosimplicial DGLA are in one-to-one correspondence with isomorphism classes of Maurer–Cartan elements of its totalization”.

    • CommentRowNumber6.
    • CommentAuthorUrs
    • CommentTimeSep 24th 2018
    • (edited Sep 24th 2018)

    added statement and pointer to proof of the fact that the totalization, in the traditional sense, is a model for the homotopy limit over the cosimplicial objects, if the latter is Reedy fibrant.

    diff, v6, current

    • CommentRowNumber7.
    • CommentAuthorUrs
    • CommentTimeSep 24th 2018

    also added brief mentioning of Bousfield-Kan spectral sequence and Eilenberg-Moore spectral sequence.

    (phew, that entry had been sitting there all the years lacking most of the homotopy theoretic information…)

    diff, v6, current

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