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Simon Lentner's user avatar
Simon Lentner's user avatar
Simon Lentner's user avatar
Simon Lentner
  • Member for 12 years, 8 months
  • Last seen more than a week ago
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Chiral homology for the Virasoro algebra and/or affine Lie algebra
I have found many interesting statements in the language of algebraic geometry etc. but by lack of literacy I am not able to destill out what concretely a "derived modular form" or "deriver graded character" of a VOA should be, in any simple example. "Factorization algebra" and "Gwilliam" was a very good suggestion, thanks! Particular for my question seems to be "Factorization algebras in quantum field theory" by Costello and Gwilliam. I cant digest this right away, but I saw smth about n-forms and also about higher coefficients in an hbar-expansion....
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Feynman rule in finite volume or at periodic boundary condition
Carlo, that would be great - do you have a reference? I would somehow expect that, but the proofs I found where too involved for myself to easily include additional potential terms (e.g. the binomial formula for V(x+deltax) does not hold if I include a cut-off)?
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Ext-Ring of (equivariant) sheaves over a variety
That was fast and exactly what I wanted to know. I appreachiate it a lot, thank you!
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Parallel transport for variety over finite field
Yes, with "sphere" I meant those varieties. @skd: I agree that onncommutativity of $SO_3\mathbb({F}_q)$ shows but my question is: I want additional structure on the variety (metric, connection or simliar thing) that produce a CHOICE of say an $SO_3\mathbb({F}_q)$-element for each pair of point $x\mapsto y$.
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