On total Springer representations for the symplectic Lie algebra in characteristic 2 and the exotic case

Abstract

Let $W$ be the Weyl group of type $B{C}_n$. We first provide restriction formulas of the total Springer representations for the symplectic Lie algebra in characteristic 2 and the exotic case to the maximal parabolic subgroup of $W$ which is of type $B{C}_{n-1}$. Then we show that these two restriction formulas are equivalent, and discuss how the results can be used to examine the existence of affine pavings of Springer fibers corresponding to the symplectic Lie algebra in characteristic 2.

comments welcome! v2: fixed typo v3: added examples in Section 14