...This chapter reviews affine flag varieties. It generalizes some of the previous results to the case where G over Z p is a parahoric group scheme. In fact, slightly more generally, it allows the case that the special fiber is not connected, with connected component of the identity...

...This chapter deals with the case of a finite field k, and a group scheme G/k. which is a form of ₘ. Euler characteristic middle convolution perverse sheaves quadratic extension Tannakian categories of perverse sheaves cohomology groups...