The basic locus of ramified unitary Shimura varieties of signature $(n-1,1)$ at maximal vertex level

Qiao He, Yu Luo, Yousheng Shi

We construct the Bruhat--Tits stratification of the reduced locus of the ramified unitary Rapoport--Zink space of signature $(n-1,1)$, with the level being the stabilizer of a vert…