English

Categorical Chern character and braid groups

Geometric Topology 2022-12-29 v3 Representation Theory

Abstract

To a braid βBrn\beta\in Br_n we associate a complex of sheaves SβS_\beta on Hilbn(C2)Hilb_n(C^2) such that the previously defined triply graded link homology of the closure L(β)L(\beta) is isomorphic to the homology of SβS_\beta. The construction of SβS_\beta relies on the Chern functor CH:MFnstDC×Cper(Hilbn(C2))CH: MF_n^{st}\to D^{per}_{C^*\times C^*}(Hilb_n(C^2)) defined in the paper together with its adjoint functor HCHC. We prove a formula for the closure of sufficiently positive elements of the Jucys-Murphy algebra previously conjectured by Gorsky, Negut and Rasmussen.

Keywords

Cite

@article{arxiv.1811.03257,
  title  = {Categorical Chern character and braid groups},
  author = {Alexei Oblomkov and Lev Rozansky},
  journal= {arXiv preprint arXiv:1811.03257},
  year   = {2022}
}

Comments

55 pages, no figures; many proofs and definitions are expanded; the introductory sections on matrix factorizations are added

R2 v1 2026-06-23T05:08:35.305Z