A universal characterisation of codescent objects

CORNER, Alexander (2019). A universal characterisation of codescent objects. Theory and Applications of Categories, 34 (24), 684-713.

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    Abstract

    In this work we define a 2-dimensional analogue of extranatural transformation and use these to characterise codescent objects. They will be seen as universal objects amongst pseudo-extranatural transformations in a similar manner in which coends are universal objects amongst extranatural transformations. Some composition lemmas concerning these transformations are introduced and a Fubini theorem for codescent objects is proven using the universal characterisation description.

    Item Type: Article
    Uncontrolled Keywords: 0101 Pure Mathematics; General Mathematics
    Page Range: 684-713
    SWORD Depositor: Symplectic Elements
    Depositing User: Symplectic Elements
    Date Deposited: 10 Sep 2019 11:54
    Last Modified: 07 Oct 2019 10:15
    URI: http://shura.shu.ac.uk/id/eprint/25080

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