Categorification of quantum symmetric pairs I

Huanchen Bao, Peng Shan, Weiqiang Wang +1

We categorify a coideal subalgebra of the quantum group of ${\mathfrak{sl}}_{2r+1}$ by introducing a $2$-category à la Khovanov-Lauda-Rouquier, and show that self-dual indecomposable…