For a natural number c,
let Gc be the unique symmetric BT1 group scheme of rank p2c with Ekedahl-Oort type
[0,1,1,2,2,…,⌊c/2⌋].
In other words, this means that there is a final filtration N1⊂N2⊂⋯⊂N2c
of D(Gc) as a k-vector space,
which is stable und…