Kontsevich's graph complex, GRT, and the deformation complex of the sheaf of polyvector fields
Abstract
We generalize Kontsevich's construction of L-infinity derivations of polyvector fields from the affine space to an arbitrary smooth algebraic variety. More precisely, we construct a map (in the homotopy category) from Kontsevich's graph complex to the deformation complex of the sheaf of polyvector fields on a smooth algebraic variety. We show that the action of Deligne-Drinfeld elements of the Grothendieck-Teichmueller Lie algebra on the cohomology of the sheaf of polyvector fields coincides with the action of odd components of the Chern character. Using this result, we deduce that the A-hat genus in the Calaque-Van den Bergh formula arXiv:0708.2725 for the isomorphism between harmonic and Hochschild structures can be replaced by a generalized A-hat genus.
Keywords
Cite
@article{arxiv.1211.4230,
title = {Kontsevich's graph complex, GRT, and the deformation complex of the sheaf of polyvector fields},
author = {Vasily Dolgushev and Christopher L. Rogers and Thomas Willwacher},
journal= {arXiv preprint arXiv:1211.4230},
year = {2015}
}
Comments
The final version will appear in Annals of Mathematics