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# Journal of Symplectic Geometry

## Volume 14 (2016)

### Number 2

### Categorification of Clifford algebras and $\mathrm{U}_q (\mathfrak{sl}(1 \vert 1))$

Pages: 541 – 585

DOI: https://dx.doi.org/10.4310/JSG.2016.v14.n2.a5

#### Author

#### Abstract

We construct families of differential graded algebras $R_n$ and $R_n \boxtimes R_n$ for $n \gt 0$, and differential graded categories $DGP(R_n)$ generated by some distinguished projective $R_n$-modules. The category $DGP(R_n)$ gives an algebraic formulation of the *contact category* of a disk. The $0$-th homology category $H^0 (DGP(R_n))$ of $DGP(R_n)$ is a triangulated category and its Grothendieck group $K_0(R_n)$ is isomorphic to a Clifford algebra. We then categorify the multiplication on $K_0(R_n)$ to a functor $DGP(R_n \boxtimes R_n) \to DGP(R_n)$. We also construct a subcategory of $H^0 (DGP(R_n))$ which categorifies an integral version of $\mathrm{U}_q (\mathfrak{sl}(1 \vert 1))$ as an algebra.

Published 8 July 2016