The center of SL2 tilting modules
arXiv:2004.10146 · doi:10.1017/S001708952100001X
Abstract
In this note we compute the centers of the categories of tilting modules for G=SL2 in prime characteristic, of tilting modules for the corresponding quantum group at a complex root of unity, and of projective GgT-modules when g=1,2.
18 pages, some figures, revised version, to appear in Glasg. Math. J., comments welcome