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 infinity integration integration-theory k-theory lie-theory limits linear linear-algebra locale localization logic manifolds mathematics measure-theory modal modal-logic model model-category-theory monad monads monoidal monoidal-category-theory morphism motives motivic-cohomology 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 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
    • CommentTimeJun 15th 2020

    I have removed the bulk of the Idea section that I had written, starting way back when the entry was created in 2013.

    I kept the other material that Mike (Shulman) had written.

    I see now that mine was really besides the point.

    Now that I finally understand this topic more deeply, maybe I find time to write a better explanation of what’s really going on.

    diff, v58, current

    • CommentRowNumber2.
    • CommentAuthorUrs
    • CommentTimeOct 16th 2021

    added pointer to:

    diff, v67, current

    • CommentRowNumber3.
    • CommentAuthorDmitri Pavlov
    • CommentTimeMay 22nd 2022
    • (edited May 22nd 2022)
    • CommentRowNumber4.
    • CommentAuthorUrs
    • CommentTimeMay 22nd 2022

    Thanks for the pointer.

    Not sure what to make of this, the question seems to be specifically about the proper equivariant enhancement of the S 1S^1-equivariance involved in the Witten genus, for which the section here at equivariant elliptic cohomology may be still the state of the art. But the OP says he has seen that page already.

    One could say much more about proper equivariance in the discussion of D-brane charge and of topological phases of matter, where its crucial and fairly well understood, as indicted in our respective entries here and here. But I sense that this is not the reply that the OP wishes to see.

    • CommentRowNumber5.
    • CommentAuthornilesjohnson
    • CommentTimeNov 26th 2022

    just a typo fix ’tha’ -> ’that’

    diff, v69, current

    • CommentRowNumber6.
    • CommentAuthornilesjohnson
    • CommentTimeNov 26th 2022

    another typo: ’suitble’ -> ’suitable’

    diff, v69, current