Non-finite generation of Frobenius maps for the determinantal ring
Let K\mathbb{K}K be a field of prime characteristic ppp, let R=K[ [x,y,z,u,v,w] ]R=\mathbb{K}[\![x,y,z,u,v,w]\!]R=K[[x,y,z,u,v,w]], and let III be the ideal generated by the 2×22\times 22×2 minors of the matrix … Set…