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    • Added redirects and a description of other contributions.

      diff, v2, current

    • I have fixed the URL of my webpage

      Philippe Gaucher

      diff, v2, current

    • starting a stub, for the moment just to record references.

      There is a plethora of constructions in the literature. Has anyone discussed in detail if/how these relate to the evident general abstract definition (maps of \infty-stacks from the given geometric groupoid to the Deligne complex)?

      I see that some authors, like Redden, partially go in this direction, but I haven’t seen yet a comprehensive account to this extent.

      v1, current

    • I agree – corrected point 3 having checked Carboni-Lack-Walters

      diff, v58, current

    • at KLT relations I have expanded the list of references. I added also references for the generalization of these relations that is known these days as “gravity is Yang-Mills squared” or similar (eventually this might want to be a separate entry).

      In this course I also expanded the list of references at quantum gravityAs a perturbative quantum field theory

    • I found the definition of a scheme to be slightly unclear/insufficiently precise at one point, so I have tweaked things slightly, and added more details. Indeed, it is quite common to find a formulation similar to ’every point has an open neighbourhood isomorphic to an affine scheme’, whereas I think it important to be clear that one does not have the freedom to choose the sheaf of rings on the local neighbourhood, it must be the restriction of the structure sheaf on XX.

      diff, v30, current

    • edited at orbispace in order to express Charles Rezk’s statement here more accurately.

    • I have added a little bit to supermanifold, mainly the definition as manifolds over superpoints, the statement of the equivalence to the locally-ringed-space definition and references.

    • Added the Yoneda-embedding way to talk about group objects and hence supergroups.

    • page about algebraic compactness.

      v1, current

    • I thought we had a reference for this on the nnLab, but now I don’t find it:

      What’s a citation for the statement that Groupoids\infty Groupoids is the terminal object in (,1)Toposes(\infty,1)Toposes?

      diff, v9, current

    • I do not understand the entry G-structure. G-structure is, as usual, defined there as the principal GG-subbundle of the frame bundle which is a GL(n)GL(n)-principal bundle. I guess this makes sense for equivariant injections along any Lie group homomorphism GGL(n)G\to GL(n). The entry says something about spin structure, warning that the group Spin(n)Spin(n) is not a subgroup of GL(n)GL(n). So what is meant ? The total space of a subbundle is a subspace at least. Does this mean that I consider the frame bundle first as a (non-principal) Spin(n)Spin(n)-bundle by pulling back along a fixed noninjective map Spin(n)GL(n)Spin(n)\to GL(n) and then I restrict to a chosen subspace on which the induced action of Spin group is principal ?

    • I am finally splitting this off from G-structure. Have added comments on the disambiguation both here and there

      v1, current