The Elliptic Hall algebra and the deformed Khovanov Heisenberg category

Sabin Cautis, Aaron D. Lauda, Anthony M. Licata, Peter Samuelson, Joshua Sussain

Research output: Working paper

Abstract / Description of output

We give an explicit description of the trace, or Hochschild homology, of the quantum Heisenberg category defined by Licata and Savage. We also show that as an algebra, it is isomorphic to "half" of a central extension of the elliptic Hall algebra of Burban and Schiffmann, specialized at σ = σ¯−1 = q. A key step in the proof may be of independent interest: we show that the sum (over n) of the Hochschild homologies of the positive affine Hecke algebras AH+n is again an algebra, and that this algebra injects into both the elliptic Hall algebra and the trace of the q-Heisenberg category. Finally, we show that a natural action of the trace algebra on the space of symmetric functions agrees with the specialization of an action constructed by Schiffmann and Vasserot using Hilbert schemes.
Original languageEnglish
Number of pages49
Publication statusPublished - 12 Sept 2016


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