Not signed in (Sign In)

Not signed in

Want to take part in these discussions? Sign in if you have an account, or apply for one below

  • Sign in using OpenID

Site Tag Cloud

2-category 2-category-theory abelian-categories adjoint algebra algebraic algebraic-geometry algebraic-topology analysis analytic-geometry arithmetic arithmetic-geometry book bundles calculus categorical categories category category-theory chern-weil-theory cohesion cohesive-homotopy-type-theory cohomology colimits combinatorics complex complex-geometry computable-mathematics computer-science constructive cosmology deformation-theory descent diagrams differential differential-cohomology differential-equations differential-geometry digraphs duality elliptic-cohomology enriched fibration foundation foundations functional-analysis functor gauge-theory gebra geometric-quantization geometry graph graphs gravity grothendieck group group-theory harmonic-analysis higher higher-algebra higher-category-theory higher-differential-geometry higher-geometry higher-lie-theory higher-topos-theory homological homological-algebra homotopy homotopy-theory homotopy-type-theory index-theory integration integration-theory k-theory lie-theory limits linear linear-algebra locale localization logic mathematics measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology nforum nlab noncommutative noncommutative-geometry number-theory of operads operator operator-algebra order-theory pages pasting philosophy physics pro-object probability probability-theory quantization quantum quantum-field quantum-field-theory quantum-mechanics quantum-physics quantum-theory question representation representation-theory riemannian-geometry scheme schemes set set-theory sheaf sheaves simplicial space spin-geometry stable-homotopy-theory stack string string-theory superalgebra supergeometry svg symplectic-geometry synthetic-differential-geometry terminology theory topology topos topos-theory tqft type type-theory universal variational-calculus

Vanilla 1.1.10 is a product of Lussumo. More Information: Documentation, Community Support.

Welcome to nForum
If you want to take part in these discussions either sign in now (if you have an account), apply for one now (if you don't).
    • CommentRowNumber1.
    • CommentAuthorUrs
    • CommentTimeSep 14th 2010
    • (edited Sep 14th 2010)

    created Duskin nerve.

    Would like to cite page and verse of Duskin’s artcile for where he defines something like the free bicatgeory on a simplex, but don’t appear to have the patience to dig through the document right now.

    • CommentRowNumber2.
    • CommentAuthorzskoda
    • CommentTimeSep 15th 2010

    One takes the 1-category of bicategories and considers the category of simplices Δ\Delta as a sub-1-category of category of bicategories. Then use the usual recipe for nerves and you get a Duskin nerve, isn’t it ? Singular functor for this particular embedding…Or I remember something wrong ?

    • CommentRowNumber3.
    • CommentAuthorDavidRoberts
    • CommentTimeSep 15th 2010

    That’s correct.

    • CommentRowNumber4.
    • CommentAuthorUrs
    • CommentTimeSep 15th 2010

    On which page does he actually say that?

    • CommentRowNumber5.
    • CommentAuthorDavidRoberts
    • CommentTimeSep 15th 2010

    Igor has it in his thesis, and he cites

    V. Blanco, M. Bullejos, E. Faro, A Full and faithful Nerve for 2-categories, Applied Categorical Structures, Vol 13-3, 223-233, 2005.

    who say they realised post-fact that Duskin got there first, and Street described the effect of the functor on objects.

    • CommentRowNumber6.
    • CommentAuthorTim_Porter
    • CommentTimeSep 15th 2010
    • (edited Sep 15th 2010)

    I’ve added a link to the page as the paper exists in an arxiv form as well. I also added a description of what it gives on strict 2-categories.

    • CommentRowNumber7.
    • CommentAuthorzskoda
    • CommentTimeSep 15th 2010
    • (edited Sep 15th 2010)
    #4 Igor was explaining us that in detail on the board in the garden of Hausdorff Institute in Bonn about at the time when the nactwist was growing and we discussed higher descent theory and fibered categories...
    • CommentRowNumber8.
    • CommentAuthorUrs
    • CommentTimeSep 15th 2010

    Igor was explaining us that in detail

    It’s not that I don’t understand the nerve of a bicategory, it is that I want to add the proper citations.

    • CommentRowNumber9.
    • CommentAuthorDELETED_USER_2018
    • CommentTimeJun 16th 2020
    • (edited Apr 11th 2023)

    [deleted]

    • CommentRowNumber10.
    • CommentAuthorzskoda
    • CommentTimeJun 17th 2020

    Duskin had many years of delay with writing due first some loss of one computer manuscript due some accident (secretary error or alike I do not remember the story) long time ago, and then a long delay due stroke which made him hard to write, though his comprehensive results are very old in this subject.

    • CommentRowNumber11.
    • CommentAuthorDELETED_USER_2018
    • CommentTimeJun 17th 2020
    • (edited Apr 11th 2023)

    [deleted]